Encoding Problem using a Question Mark

Hello
I have a perplexing problem that I wonder if anyone has seen before.
but perhaps you have run across it before.
In the product description, I am putting trying to put in this link

http://www.avalanche-ranch.com/rusticlighting/pc/viewPrd.asp?idproduct=69377

but after I save the page, this is what it retains:

http://www.avalanche-ranch.com/rusticlighting/pc/viewPrd.asp™idproduct=69377

For some reason, the ? mark is converted to the ™ html code tag. 
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To troubleshoot, I have gone into the adminheader.asp file and made the charset to be UTF-8 but that didn't help. I am wondering if has to do with ajax, or javascript or something that I know nothing about...but perhaps related.
Or is it a problem in early impact software?  Is there a workaround anyone can think of?

Thanks
Curt