Issue Description:
When I downgrade my living armour with Storm Trooper(level 4),it costs my points rather than decrease it.

What happens:
It should decrease 65 points but it costs!

What you expected to happen:
If it's a bug,please fix it.

Affected Versions :

• BloodMagic: 2.1.11
• Minecraft: 1.10.2
• Forge: 12.8.3.2316