We are noticing that sometimes using the ExtendSrf command results in the surface edge retreating instead of extending. This happens if you accept the value (as opposed to dragging with the cursor). Here is a video. In the video I call up ExtendSrf then accept the value. Then I undo before I go to the next edge.
This is in V6 SR2. I will attach this file for testing.
Extend surface anomoly.3dm (141.7 KB)