My findings:
1/ I needed to switch this to disable (or eliminate the line). Really curious. You give the command "please enable", and it does the opposite. In my opinion this is a bug.
I'm pretty sure we are talking about a bug. I.e. that boolean is somehow interpreted negated.
My question is the following: how can I use precise movement?
I'm pretty sure the answer is NO (using this lib). I struggled a bit and wrote myself some code. But I ended using another lib. More info in this post.