Steemcleaners and adm are legitimate parts on Steemit who search out spam and plagiarism. Steemcleaners are on discord and can be spoken to in order to appeal flags and blacklisting. They only flag if you are posting referal links to crypto sites, images from google that you claim as your own or did not credit the original author and material you have copy and pasted from another website. You can speak to steemcleaners staff here