Describe the bug
My Off & On button will not work after adding two of the same ores.

To Reproduce
Steps to reproduce the behavior:

1. Add an ore
2. Give some random block ID
3. Make another ore.
4. Give it the same ID
5. Try to turn them off and on.

Expected behavior
To be able to either:

1. Tell me that "There is an already existing Xray value for that ore!" (or something along those lines.)
2. Delete the ore
3. To be able to turn them both off or on.

Screenshots


(Even though it says sand or gravel, I made a big mistake, and put them as the same ID.)

(I know you can't hear it but, I am trying to click them.)

Minecraft Environment
MC 1.7.10
Questing Mayhem 1.7.10

Additional context
XRay MC1.7.10 - 1.0.8

Two of your items have the same id:meta, remove one of them and it'll start working again