Yep, it doesn't matter if you're on exhaust stroke TDC or compression stroke TDC for the piston's position relative to the spark plug. (mechanics.stackexchange.com)
With high - performance camshaft timing, exhaust valves in different cylinders can be open at the same time, overlapping at the end of the power stroke in one cylinder and the end of exhaust stroke in another. (en.m.wikipedia.org)
It utilizes what is known as a wasted spark system, the spark is fired off on TDC compression and TDC exhaust strokes. (mechanics.stackexchange.com)