Your question has been answered about when to submit room requests, but I just wanted to add a quick note that there are very few (if any) TPV rooms on the first floor since the Bungalows were built several years ago. Most of the TPV rooms are on the third floor followed by the second floor. Most of the first floor rooms are LV rooms (also some on the second and third as well).
I perhaps get a bit over-focused on getting a third floor room myself. We have had mostly good luck with being assigned the third floor, but occasionally have had a second floor room. I always have to mentally prepare myself that both are possible.
If you arrive and are given a second floor room, don’t hesitate to ask if something else might be available - even on the first floor acknowledging it may be a lesser view category than what you have booked (in this case, LV vs TPV). If you let the CM know you are OK with that they can let the room assignor know.
I’ll also caveat that Poly tends to run pretty high occupancy so moving room assignments is easier said than done, but anything can happen.
Enjoy your trip. Poly CL TPV is probably our favorite overall room type/resort/CL combination, despite any second floor/third floor ‘heartburn’.