I've noticed that sometimes when editing a program, a strange function appears.

For example, I want to add holes in the middle of the program. 

So I use the “pinned” function to repeat the addition of holes, set the first one, validate and move on to the next.

But the second one adds the thread measurement function, whereas it wasn't on the first one.

I know that there were already threaded holes present on the original program and I suppose this has something to do with it.