Yep, not very clear on that pdf file. But most companies don't share any of their table. I think what the manual is saying is the PIC chip inside is programmed for 4 degs advance at idle (they determine what is "idle" in the PIC table), 10 degs at 2000rpm, and 35 degs at & above 4000 rpm. These are points along their curve. These aren't step functions, it is a linear increase in advance (or removing of retardation). I think when you're trying to start, the ignition is at full retard, 35 degs. I'm guessing as soon as the engine fires and sees, as Dogshome said, any close pulses (close compared to trying to start the engine), the box interprets it as 'running at idle' and gives you 4 degs advance right away. That can rise very quickly if you happen to start at a wider throttle opening.

So, I'd guess, when you're hand flipping it to start, your spark is close to 35-28=7 degs AFTER top dead center. This is a very safe, reliable angle to hand start an engine because there is little chance of firing before top dead center either injuring the user or just running backwards.

I have a 27% Cap232 with a CRRC Pro 50cc engine in it. It starts backwards about 50% of the time and it's only set to 31degs BTDC. Of course, there's no telling what CRRC's advance (or retard) profile looks like. CRRC makes their own ignition and they don't share the PIC table.