If you are using the 1080(720/60) quality setting then the Tablo will use 2 tuners when recording a 720 channel. Maybe this is why you are not able to use all your tuners. Try the 1080(8mb) setting and see if it makes any difference.
If you are using the 1080(720/60) quality setting then the Tablo will use 2 tuners when recording a 720 channel. Maybe this is why you are not able to use all your tuners. Try the 1080(8mb) setting and see if it makes any difference.