TOPIC: Return from PayPal page is scrambled!

Hello,

We are building an online registration portal on our website at http://www.uts.edu/cbtestreg.html .

Using Dt Register 2.6.9, Joomla version 1.5.18

The registration includes payments via PayPal. Now, we are experiencing a display error when returning from PayPal to our site. All modules that we have accross our site display several times over at once.

What could be causing this, please advise!