Depends on your bookies rules... Some a tie is a lose. Some a tie will push it to a 6 teamer parlay. Most locals do tie=lose so they round up the half point. If your lines were all rounded up the half point then your parlay is probably dead
are you sure you're not thinking of a Teaser ?? never heard of a Push in a parlay losing...
If you played a 7 team Parlay and even if 2 teams Push, it should convert to a 5 Team parlay.
Here's another example .. play a 2 Team Parlay and one pushes, it will convert to a Straight wager
Anyone playing at a Shop or Local that pulls a Push is a Loss with a parlay, should tell the guy to fuck off