I didn't see it that way at all. Clary went to Simon. Alec went to Magnus. Jace went to Maia. With all of the couples, the Shadowhunter was slammed/told off by their Downworlder counterpart. For me, the parallels made sense if your plan was to hook Jaia up in the end.
AHHHHH TRUUUUUU! i was going to mention, what downworlder is jace actually close with to even ask for a sample of hair/put a tracking device in them? you right anon, completely right
WOW I CANT BELIEVE THEY DID THAT YET AGAIN BTICH