The ONLY thing that is aggravating about Geni is how one's tree can suddenly get messed up due to merges. However the benefit that Erica mentioned that you get from all the collaboration far outweighs the issues with mergers. There are very helpful curators who you can get to help with the merger issues. Merger issues tend to be worse with historical figures and it's wonderful to have the curators help with those ancestors.
I get more out of Geni by far than out of Ancestry, although I like Ancestry for raw information access and use it for research but keep my tree here and of course as a back up on a Mac program.
I was removed from management of a Geni profile by a curator after questioning the veracity of certain statements and pointing out hoax images. The questionable statements are still included foremost in the article, the images cannot be deleted nor disassociated with the profiles, and every statement which pointed out the error which could be removed by that curator was removed entire. I have been given no way to escalate the situation to higher authority beyond that curator. Therefore, I would not recommend Geni at this time. I write this with the expectation it may well also be deleted. No confidence.
Are you sure that you are looking on the set of profiles you have been working on?
Even if you removed yourself as manager of a profile your work would still be listed in the revisions log and if this was a line you have added you would naturally also be listed as a manager on the surrounding profiles.