How do I arrange my inventory in TF2? I've noticed some people's backups have a page for stranges, a page for uniques, etc. Everytime I sort my backpack based on Quality though, when I view my Steam BP online, it still shows up as unoragnized and jumbled up.
Drag and drop.
Though, your TF2 inventory and your Steam inventory are not the same thing. There is a delay in synchronization.
If you know you moved the items, but it doesn't look right outside of TF2, just wait a few hours.