[blykins]

You're confusing cam timing with ignition timing.

Cam timing is the relation of the valve events to the crankshaft position. If he set it at 2 degrees advanced, then the LSA was 107 and he put the ICL at 105.

Ignition timing is where the plugs fire in relation to the piston position. If you set the initial timing at 12 ° BTDC, then the plugs are going to fire at 12 degrees before TDC until the distributor advances the timing. If your distributor has 20 degrees of mechanical advance (for example), then your total timing is 32 degrees.