The problem I believe is you don’t close the link element. So your code should look like this:
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RXYSPNJKJUVB2">
<img src="https://www.paypal.com/en_US/i/btn/btn_donateCC_LG.gif" alt="" />
</a>
Notice the . This close the link and should stop it from making everything else on the page a link as well.
I tried putting in the at the end but the problem remains.
Fixed! I had the </ a> in there but I was missing a > at the end of the link.
Thanks