It is possible there is an issue with your Identities, and this is causing some of the strange things you're seeing.
First, please try opening a new Identity and see if everything looks alright (by the amount you have I am guessing you know how to do this!). Try and see if you can replicate what is happening in the other Identities, and check to see if the issues continue.
If so, write them each down, and let me know! As many specific details as possible will help me to assist you. Also, make sure the Skins are IncrediMail 2 and not IncrediMail Xe skins.
As for the Forum incorrectly identifying your system, it does not automatically recognize your browser and system. You need to change these manually when you post.
Thanks, and look forward to your response.