Upon looking at the schedule, I saw the following trains had Multilevel equipment:
When riding 50 from Port Jervis, a Multilevel set was passed at Suffern signed as 1156. This one would've first gone west on 1103. At Route 17, 1154 was passed which was also a Multilevel set. This is the Suffern based one as discussed earlier.
Another one was passed at Waldwick. I didn't see what it was signed for, but based on the time it had to have gone east on 1206. I saw it arrive at Hoboken although no train number was displayed, but it turned into 1207. When my train arrived, I also saw one other Multilevel set already in Hoboken which would've had to gone east on 1152 which I've seen in Suffern before with Multilevel equipment.
On the way back to Port Jervis, my train (43) passed another Multilevel set that looked to be on 1212. I know that trip's equipment deadheads west, but I don't know if it was it's own set or if it was the same as 1152.
Another thing that was kind of odd is they sent 52's equipment west on 43 rather than 48's after a 2 minute turnaround. I know equipment cycles are always subject to change, but I wonder why the change was made today. 48 had a full NJT set (saw it in Port Jervis before boarding 50) so maybe they were swapping it out with a Metro North set.