Flagged posts on Craigslist... What a lame situation!

It has been going on for many months now, and was wondering if others were experiencing the same problem ?

All the posts we place on Craigslist to advertise our services, are systematically flagged within minutes after posting.
These are simple legitimate posts.
(Note I do not have that problem with other type of posts, only when trying to advertise our services as software engineers.)

Maybe a dishonest competitor is using an automatic flagging service, I do not know.

Does anybody have suggestions on what are good alternative to Craigslist ?
This makes me wonder about the quality of the ads that do stay up on Craigslist...