That observation, while it serves as a viable conclusion to prove the existence of the multiverse, which I was already certain of, it doesn't prove time isn't linear here.

[He does think that is a relevant point. This place snatching from different points in different timelines and dimensions does not mean it's own flow is not linear.]

Given the history of the other tear, and the fact that the Fates were not subtle, I would disagree. Besides, one would find more dimensional instability if that was true. Imports were basically fueled by dimensional rift energy and could cause issues. That this place isn't tearing apart at the seams means it's likely not the same issue.