3 phase math option

So I have 3 Phase setup , three clamps, when I select Math option to group readings should I see only one sensor in the flukso portal? as I still see six sensors (+ & -). I am trying to hook up to PVoutput for consumption but unsure what sensor I should use

also I dont seem to be getting a wattage reading - its very low on the gauge, am I doing something wrong?

I used to have a flukso v02 which worked perfectly but it died so now have the v03e