Degree wheel, confused!

I made an pistonstop by using a sparkplug. Put the piston at TDC, zero the wheel put the pistonstop in place, turned the crankshaft to the stop clockwise noted the reading, turned the crank counterclockwise to the stop noted the reading. Added the two readings divided by two, set the wheel on the result. The zero on the wheel match the mark on the damper.
Zeroed the indicator at max lift then I took the reading .050 before and after max lift, all this on #1 intake.
The result was 44 and 79 degrees on the
degreewheel, but this a 90-90 degree marked wheel, and its here I don't get it. If I add 90 degrees to the 79 degree and add 44 degree reading divided by two I come up with 106.5 degree and that's the number I installed the shaft at when I assembled the engine.
However I'm not sure of that this is way to calculate the centerline.