So just to interpret..

72@6% (4.22 kg fat 67.78 lbm)
to
91@15% (13.5 kg fat 77.5 lbm) 10 kg lbm is soild for the cycle.
to
81 @ 10.45 (8.2 kg fat 72.8 lbm) You lost half your lbm gains.

If you are going to run a cut cycle at what you are as calculated above and keep 5-6kg lbm with the same general results from your diet it will be an uphill battle to reach your goals. Doing an assisted bulk then an unassisted cut did not help your case. If you are currently at 9% and still unassisted cutting you are most likely 4KG or below total gains.

You should hit up Austinite. If it is a diet issue he is the guru.