Error - not sure if it is Bug

Hello

i just got an error trying to post, in case it helps identifying the issue, here it is:

An error has occured.

If you need assistance, please notify @jesta here on the forums, on steemit.com, or via steemit.chat. Please include the error message shown below.

10 assert_exception: Assert Exception
( now - auth.last_root_post ) > STEEMIT_MIN_ROOT_COMMENT_INTERVAL: You may only post once every 5 minutes.
{"now":"2017-06-14T18:28:12","last_root_post":"2017-06-14T18:24:03"}
th_a steem_evaluator.cpp:522 do_apply

{"o":{"parent_author":"","parent_permlink":"steemit","author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","title":"Need help with thumbnail or picture alignment","body":"Hello\n\ni am trying to find a way to align a picture in the center, using the link that is provided with the  'tricks' , didnt help. From html, i know that you can do with 'align=center' but i seem to have some issues, not sure if it works.\n\nAny ideas?","json_metadata":"{\"app\":\"chainbb/0.1\",\"format\":\"markdown+html\",\"tags\":[\"steemit\",\"help\",\"picture alignment\",\"html\"]}"}}
th_a  steem_evaluator.cpp:695 do_apply

{"op":["comment",{"parent_author":"","parent_permlink":"steemit","author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","title":"Need help with thumbnail or picture alignment","body":"Hello\n\ni am trying to find a way to align a picture in the center, using the link that is provided with the  'tricks' , didnt help. From html, i know that you can do with 'align=center' but i seem to have some issues, not sure if it works.\n\nAny ideas?","json_metadata":"{\"app\":\"chainbb/0.1\",\"format\":\"markdown+html\",\"tags\":[\"steemit\",\"help\",\"picture alignment\",\"html\"]}"}]}
th_a  database.cpp:2879 _apply_transaction

{"trx":{"ref_block_num":40987,"ref_block_prefix":3823778357,"expiration":"2017-06-14T18:28:24","operations":[["comment",{"parent_author":"","parent_permlink":"steemit","author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","title":"Need help with thumbnail or picture alignment","body":"Hello\n\ni am trying to find a way to align a picture in the center, using the link that is provided with the  'tricks' , didnt help. From html, i know that you can do with 'align=center' but i seem to have some issues, not sure if it works.\n\nAny ideas?","json_metadata":"{\"app\":\"chainbb/0.1\",\"format\":\"markdown+html\",\"tags\":[\"steemit\",\"help\",\"picture alignment\",\"html\"]}"}],["comment_options",{"author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","max_accepted_payout":"1000000.000 SBD","percent_steem_dollars":10000,"allow_votes":true,"allow_curation_rewards":true,"extensions":[[0,{"beneficiaries":[{"account":"chainbb","weight":1500}]}]]}]],"extensions":[],"signatures":["2027e0c7e891c6688586e81620d4ae321cd999a0cbd5bed4bbc641c5bb736cb3a37241d017d1bd69b0b42f77700e0426649f9a7c99292526be9743219376b5e5ad"]}}
th_a  database.cpp:2883 _apply_transaction

{"trx":{"ref_block_num":40987,"ref_block_prefix":3823778357,"expiration":"2017-06-14T18:28:24","operations":[["comment",{"parent_author":"","parent_permlink":"steemit","author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","title":"Need help with thumbnail or picture alignment","body":"Hello\n\ni am trying to find a way to align a picture in the center, using the link that is provided with the  'tricks' , didnt help. From html, i know that you can do with 'align=center' but i seem to have some issues, not sure if it works.\n\nAny ideas?","json_metadata":"{\"app\":\"chainbb/0.1\",\"format\":\"markdown+html\",\"tags\":[\"steemit\",\"help\",\"picture alignment\",\"html\"]}"}],["comment_options",{"author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","max_accepted_payout":"1000000.000 SBD","percent_steem_dollars":10000,"allow_votes":true,"allow_curation_rewards":true,"extensions":[[0,{"beneficiaries":[{"account":"chainbb","weight":1500}]}]]}]],"extensions":[],"signatures":["2027e0c7e891c6688586e81620d4ae321cd999a0cbd5bed4bbc641c5bb736cb3a37241d017d1bd69b0b42f77700e0426649f9a7c99292526be9743219376b5e5ad"]}}
th_a  database.cpp:660 push_transaction

{"call.method":"call","call.params":[3,"broadcast_transaction_with_callback",[null,{"ref_block_num":40987,"ref_block_prefix":3823778357,"expiration":"2017-06-14T18:28:24","operations":[["comment",{"parent_author":"","parent_permlink":"steemit","author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","title":"Need help with thumbnail or picture alignment","body":"Hello\n\ni am trying to find a way to align a picture in the center, using the link that is provided with the  'tricks' , didnt help. From html, i know that you can do with 'align=center' but i seem to have some issues, not sure if it works.\n\nAny ideas?","json_metadata":"{\"app\":\"chainbb/0.1\",\"format\":\"markdown+html\",\"tags\":[\"steemit\",\"help\",\"picture alignment\",\"html\"]}"}],["comment_options",{"author":"ak892n","permlink":"need-help-with-thumbnail-or-picture-alignment","max_accepted_payout":"1000000.000 SBD","percent_steem_dollars":10000,"allow_votes":true,"allow_curation_rewards":true,"extensions":[[0,{"beneficiaries":[{"account":"chainbb","weight":1500}]}]]}]],"extensions":[],"signatures":["2027e0c7e891c6688586e81620d4ae321cd999a0cbd5bed4bbc641c5bb736cb3a37241d017d1bd69b0b42f77700e0426649f9a7c99292526be9743219376b5e5ad"]}]]}
th_a  websocket_api.cpp:124 on_message (see err.payload for the full e