About your items
You are seeing the list of items that you aqcuired by spinning this loot crate. The items can appear in other loot crates, so the number next to an item is the collected sum of all possible crates.
The item data is saved in (propably) the safest place: Your browser's local storage. You might not see all items that you may previously gathered. It's mostly because of local storage data being lost.