Well, here is the answer to my question, may help someone wondering out here: Blocktrade.us had been overloaded and offline for a few minutes, causing pending deposits on BTS. It's now up and back online, ready for transfers. Hence, I got my deposit (BTS <3) and the deposit "limit" I was talking about has now been set to 3.5 BTC (maximum deposit transfer allowed). Back to normal then! :)