SEO URL Page change error

Hi,
I am having an issue with "Use SEO URL's:" on. With product categories that have more than 15 items in that category when the next page is selected the URL is EXAMPLE: https://mydomain.com//Smart-Phones-A/Ap ... ies?page=2

The question mark is causing the second page not to load. If I change it to an & it works perfect. Did anyone else have this problem? Could not find the issue here. I am using version 1.5.6.4 and the MarketShop theme.

Thank you in advance for any help.

Well, in my OC-1.5.6.5_rc, it works well by use of the question-mark, and if I use
a '&' instead, it also displays the page, but changes to the question mark linking
again, when I then select the next/last page function.
http://www.bigmax.ch/shop/Monitor-small?page=5
http://www.bigmax.ch/shop/mac?page=2
But be aware, SEO won't work with all my Pages, I only temporarely changed
some linking to SEO, to make this test ! But I have no idea, what influences
you linking, you may also test this by use of your Default Theme, to make
sure, it's not related with your Custom heme.
Good Luck !
Ernie

Thanks for the reply. After searching around for awhile I found a solution in seo_url.php . I was able to add an if statement to replace the ? with an &.

Regards,