Defective t-stat?

[td30]

Update on this situation:

First of all, yes I did purchase them from Rich at Reptile Basics. He has been very good, exchanging quite a few emails with me and the problem is resolved to my satisfaction.

Here is a quote from one of his emails (posted with his permission) that might be useful for anyone else that runs in to this problem.

Thanks for putting in the time to figure this out. I did not know exactly why it did that only that it didn't seem to affect its function. Thanks again!