Can't enter as class in raid finder raids in a 8-men premade

Server: Moogle
Time noticed: tonight
Frequency: Always
Issue: Nothing much to add to the title really, as stated in Raid Finder description, it's "Job only", even if using a 8-men premade, weither you select "Duty completion" or "Practice" as Objective.

Shouldn't the "Practice" objective remove this limitation the same as it removes the "same job" limitation?
This was not present before the raid finder introduction and there have been some "class only" down in coil back in the days.

Is this really intended? (note again that I'm talking about 8-men premades, not incomplete groups)