Dressmaking and pattern layout: folded vs open fabric?
When given pieces that are too wide for the folded fabric (see piece E in your diagram), pattern cutting layouts will show cutting on a single thickness of fabric, rather than a folded piece. This is very common when the pieces won't fit the standard width of fabric in the correct orientation without unfolding it.

"Precise matching" of pieces isn't particularly critical in most patterns; the size of the pieces is sufficient to compensate for any small differences in the cut pieces. It's also more likely to have minimal differences in the two pieces when they're cut separately, as fabric can shift or be wrinkled on the lower layer, leading to a misshapen piece.