I am still missing something???

1968 911L Prof. rebuilt 2 yrs ago to orig. specs. about 2000 mi on engine ran fine.

Equip. MSD with tach adapter, New Pertronix and coil, Distrib. rebuilt by PartsKlassik, Distrib. graph shows: 1000 rpm with 2deg adv., 5500 rpm with 18 deg advance.

Actual running: Static 3-5 deg adv. BTDC to start. Running at 1100-1500 rpm creates 20 to 30 deg adv. Static check for TDC at No 1 is verified. This condition existed before the distrib. rebuild. Using ccw distrib. rotation to retard, and cw to advance, I am not able to replicate the distrib graph? I am afraid to try anything near 5500 rpm. Carbs were balanced front to back and side to side at 7 on the synchrometer before the current condition, now require 10.

What am I Missing? Any help is appreciated?