Global and calculated data

Issues
1

I managed to assign a tool for both global and calculated data at the same time, and I can not remove either of these tools. What with this?

2

I solved the problem by deleting the object and creating it again. It should not happen, I think

3

If you find a way to reproduce this please post again, thanks!

4

I can not repeat it, if I can, I'll let you know. :)