Lute tablature rhythm signs aren't part of automatic avoidance of overlapping

The lute tablature flags (rhythm signs) have some problems, that probably result from their implementation.
1. They aren't included in the automatic avoidance of overlapping
This is quite a problem, as they doesn't seem to exist for this automating. In my example you can see, that the bar numbering overlaps with them and also with the title box (I set the distance below to 0 to make it clear). And probably it also should automatically avoid the tablature signs in the row above.

2. Probably this also has to do with the problem, that they are not at all editable ...

I think, this these problems can be seen clearly in my example.