Reshade Q

[smink1701]

Reshade works great but when I select Curves to add or roll back gamma, the moment I select with left mouse button the value jumps to the left in slider and goes to 0.650.  On all the other settings when I do the same move it allows me to do so by holding down left mouse button and sliding mouse left and right to add / detract value.

What's up and thanks for your help!