I just tried it here by creating a user property with the same name in two different auction templates but evyerthing works as expected. Both auction templates show the individual value of the user property correctly.
Am I missing something? If so how can I reproduce this issue?
It seems to occur randomly. Some of my templates will hold properties correctly, and not show any problems when creating them. Others give me no end of trouble. I haven’t figured out the difference between the two yet, but when I do, I’ll report back.