You have no problem approving additions in pre-production but don't allow corrections

I submitted two listings for people that were slated to work on the film while my film was in pre-production. Now that we're in post production, I tried to remove the two people that ended up NOT working on the film and therefore need to be deleted. Yet they just sit there... I made the initial entries and I very well know who was on set and who was not. You need to take the original submitter's word for corrections and it should never get to this point. I see other people having the same exact issue. This is a problem on your end and you really need to correct it. Now fix my listing!