Vertical offset of wedges

I might be missing something but,

Selecting the first wedge results in

image

and selecting the second wedge results in

image

Should not the y-values be qual?

Is there any value (or setting) with the first line (or 3rd or 5th) as 0, like in Sibelius? I find that easier to work with and place wedges more precisely.

TIA.

I hate to be a stuck record, but we need projects rather than pictures to be able to diagnose these kinds of issues (a reminder).

These properties are offsets rather an absolute values, so zero is the calculated position rather than the middle of the staff or whatever. This is helpful because it means that if you e.g. change the pitches of the notes such that the hairpin needs to move, the offsets can be applied relative to the new calculated position.