Do all of the invaders occupy the same MapLocation at once once the "foreach" loop of invaders is finished (in Play)?

On each iteration of the while loop, we reach the "foreach" loop of invaders, and then we iterate through the "foreach" loop, running the code within for each invader. Each invader has an initial location of (0, 2). The first invader moves once to (1, 2), checks if it's at the end of the path, and then we add to our "invadersRemaining" tally before moving onto the next invader in the loop. The next invader also starts on (0,2) and moves to (1, 2). And same for the rest of the invaders until we're done with the loop.

At the end of the "foreach" loop in the first iteration of the while loop, it seems as though every invader would occupy location (1, 2) -- all stacked on top of each other!

I just want to make sure I'm correct about that & not misinterpreting something. I think that's right, but I suppose it seems sort of odd -- perhaps I was expecting them to form a forward-moving line rather than a blob!