Just pushed a fix for some items purchased from the store not stacking correctly with items found/crafted in the world. This mostly applied to ammo, but some other items were also affected.
If you’ve purchased items from the store prior to this fix that are not stacking correctly and wish for them to be fixed, please open a ticket in #admin-help on our Discord and we will update the items for you manually. Please have them in a separate container at your base before opening the ticket and keep in mind it may take some time before we get to it.