Multiple bugs?!

I’ve found 2 bugs

I use GSiteCrawler to make a sitemap.
In the sitemap i saw many lines with something like:
page/12/?post_type=coupon_type
page/11/?post_type=coupon_type

The other problem is with sorting on a subpage.
When you sort only Title, Old or New everything is oke, but after you sort on let’s say Title (a-z) and sort on Title (z-a) you get:

?orderby=title&order=asc&orderby=title&order=desc

And when you sort again on Old you get:

?orderby=title&order=asc&orderby=title&order=desc&orderby=date&order=desc