Issue description:

When you get a stack of enderpearls, it gives you 16 pearls, because the max stack size is 16
When you right click (try to get 8 instead of 16) then it still gives you 16

So, it doesn't handle smaller stack sizes properly

Version (Make sure you are on the latest version before reporting):

• Minecraft: 1.10.2
• Forge: 12.18.2.2114
• Refined Storage: 1.2-beta5

Does this issue occur on a server? Yes, it does occur on server and client side