Uninstall this addon, the issue has been fixed.
There is currently a bug with the Auction house where you cannot filter for item levels higher than 60. Since item levels currently go up to 116, if you change the item level filter to anything but 1-60 items above item level 60 will not show up. This addon fixes this issue by raising the max item level filter to 120.
This addon does not replace the Auction house addon, it simply overwrites certain functions in the MarketplaceAuction to fix the issue. When the issue is fixed by Carbine, remove this addon.