This isn't very new, also TF2OP have done all they can to stop phsing on the site, its on valve to get a fix stopping it.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/#c540742485382266453

Try clearing your cache.

Try clearing your cache/ using a different browser.

The cs:go api has had troubles since the beginning, the staff are waiting on valve to release afix for this issue.

Check that your settings match http://outpost.gg/bsod/r04goa.png exactly.

The time it takes for a ticket to be answered depends on the availability of the admin assigned, so there's no real estimate.

No ban appeals here. Create a ticket on the site

The I'D of an item changes when the item is modified (paint, name, description) so looking at the I'd won't give a definite indication of if its a dupe. Check the item history on backpack.tf, this will usually display wether or not its duped.

No ban appeals here, make a ticket on the site.