If you click the auto match button the button stays pressed, so it stays active. You need to click the button again, then it stops changing the curve permanently.
Before 1st Click:
After 1st click:
After 2nd click:
If you click the auto match button the button stays pressed, so it stays active. You need to click the button again, then it stops changing the curve permanently.
Before 1st Click:
After 1st click:
After 2nd click: