Combination of beams and slurs works badly with two voices in Tab staff common

Nightly 4591fe0 or MuseScore 2.0.1 / Windows7

1) Load this file : test file common.mscz
2) Add a half note G bass (voice 2) on the first beat first measure in standard staff.
Result : the slurs collide badly with the beams in Tab staff

If you try to Select "All similar elements in same staff", and change the vertical offset in the Inspector, the result is wrong.

3) Now, also disturbing, more maybe : try to flip the direction of the beams in tab staff (via "X" key, or in Inspector, Up/Down)
Result : it doesn't works all all (in contrast with those in the standard staff) :(
Is it a separate issue, or not? Your advice?

4) To finish, load this file (tab type full) : test file full.mscz
Result : better, but perfectible (slurs touch the beams). Notice here that flip direction of the beams works.