First of all thanks for your work.

Now the possible Bug:

I've installed your Mod yesterday and changed only the weights of some items like Stone from 0.5 to 0.25. Today after a Server-Restart I saw my Oviraptor wandering around in my base. But this shouldn't be possible, because I overburdened them with stone to prevent them from moving. So I looked into their Inventories and the stone was still there, but the weight of the Ovi was saying 12 of 200. Then I moved one 100 Stack of Stone from its Inventory to mine and back. Now the Ovi had the inted 200 of 200 weight again.

So I guess your mod is somehow messing with the Inventory weight.