The filter is showing incorrect prices. Here's the VM catalog page vs the JAM page:
http://flf.hawkfeather.com/quick-ship-leather-furniture/by,product_price?keyword=
vs
http://flf.hawkfeather.com/leather-furniture/miscellaneous/products-filter#sort=price&sortdir=asc&attr.cat.value=36&page=1
The issue is 'frontend_price' at line 50 in:
/plugins/jamegafilter/virtuemart/layouts/layout2/product-item.php