I have my applications as Force Run with both options checked wait on force
Run & Determine force run order

It took some time, but I have the order numbering the logical way to me (so
one app gets installed after another etc)

Yes Adobe CS 2.3 scripted install does behave as expected.
It still runs when the apps with higher force run order start running (and
as it is all msiexec based then complains happen)

Anybody has any idea how to sort it?

Zen 7 SP1 IR3a on NW 65. SP5