When you throw all of your stuff, it still thinks you have the quiver or bag on you. So if I use Jarids, the game will always not let me use one of my slots, even after I've thrown all of them. Perhaps even more annoyingly, if you are engineering and you throw a construction site or siege ladder, you won't be able to use 3 of your slots. Also, you'll still be slow as if you're carrying that extra weight, too. Unlike bows and crossbows, you can't just drop the the main weapon and the ammo drops with it. The only way to fix it is to use an equipment table or die.