WowAce

What version of Grid2  are you using (Version is displayed in General/About Tab) ?

3.1.7

What game client version, classic or retail, windows or mac and language are you using ?

retail english 

What steps will reproduce the problem?

It is not possible to assign both private auras and regular debuffs to the same icons-indicator group - if assigned to the same position private auras will simply overlap an already existing debuff

Please provide any additional information below.

 Not sure if this is actually possible with addons in midnight, however it is functionality that the default frames do have 

Not possible for addons, blizzard code has no restrictions.