Topic: Headphone mix with FFUC + Logic

Hi everyone,

I recorded my jazz - band with FFUC last weekend.
The setup was FFUC + Presonus Difimax FS -> FFUC ADAT + 2 Headphone distributer preamp connected to output 3-4 and 5-6.
The DAW that was used was Logic 9.1.3.

I created 2 Aux inputs in Logics mixer.
The first Aux's input was chosen as Bus 4 for first headphone pre and the outs were chosen as out 3-4 in Logic.
The second Aux's input was chosen as Bus 5 for second headphone pre and the outs were chosen as out 5-6 in Logic.

I went to the Total Mix and assigned 3-4 to the 1st Phone Mix and 5-6 to the 2nd Phone Mix.

In the mean time, I wanted to let the recording engineer to monitor our recording from FFUC's Phones ( out 7-8 ) which is independent from the to other headphone mixes.
However, somehow either Logic or Total Mix was summing up all of the headphone mixes.
It was loud and clipping. Phones mix1 and phones mix 2 was OK.
It's just the phones out on the FFUC itself ( which could be used as out 7-8 ) was summing everything up.

How could I achieve this without summing up signals on the main monitor mix?