That does seem to be the case, however it would not actually make a difference in the print, since it still gets printed as a single layer, due to the irregularities being less than a layer’s height (if I’m not mistaken). I believe why you’re seeing that weird texture/pathing of the toolhead, is because of the model not being completely square because of the hinge, and you using Concentric pattern for the top layer.
If switching to Monotonic Line (which I’m using), it looks normal after slicing:
Everything still looks normal the next layer down.