There seems to be an issue with the paging, Example I have loaded all the AK47 skins and those work fine, however any other item that has more than 36 skins like some of the clothes or boxes etc will not page over as expected. or if an item would even quailfy for 3 pages to see them all will not page over past the first page. 

With the help of @misticos we got it all figured out. If you want to use a large inventory and larger box size you have to change the configs settings to the following:

"Container Panel Name": "genericlarge",
"Container Capacity": 42,

This will give you the larger box instead of the 36 slots to be ablee to view even more faster.