Hey! Possibly... Do you mean that you had empty slots still? There are some weapons that are two-handed and do not permit to equip on the other hand. There is a bug related to this, that you need to pick up the weapon and put it back down, so that it registers that the two-handed weapon is no longer equipped. I gotta say, inventory system's edge cases are endless. There is always something you didn't plan for, but I think it ended up in a very complete state. One other thing I noticed later is that when the inventory is full, dropped items still disappear, which didn't always happen. It was some bug I introduced late in development...