pref/bid day

You can only get one bid. This isn't informal recruitment, and it's not like fraternity recruitment. You can list a maximum of three houses on your MRABA at the end of the week, and you will be given a bid to one of those three houses.

If quota is 90, and you are in the first 90 to list your #1 choice as #1, then you'll get your first choice. If they fill quota before they get to you, then you'll get your second choice if you are in their first 90. if they fill to quota before they get to you, then you may get your third choice. If all three fill to quota before getting to you, you'll be a quota addition, probably with your first choice house (although there is no guarantee of that).

Regardless of which choice you are matched with, you will only be matched with a single house. The bid you open on bid day will be your one and only, and you will be pledged to that house.