Creating them on the same day is only needed if you combine into one license file. Otherwise I'm not aware of any problem generating them on different days.
i am saying each servers license file when combined everything in that license would have to be generated on the same day
there are known issues with cascading with the 2012 products
Agree, and that's why it might be needed to review the license files to determine that. It can be done by searching for ISSUED= and then make sure the date is the same for all instances within the license file.
I sent the license file via the textbox in private message since I do not have your email address. syi(at)timhaahs(dot)com is mine if you prefer to correspond in that way.
If you think it's a better idea for me to talk to someone at Autodesk, I can do that too.
I got one attachment. Question is if this was for one license server or all. If it was for one license server your problem might be that the parts are issued at different dates. Suggestion then is to request a completely new license file for each server.
I've added link for contact details on my profile as well as sent you a direct email.