Historically I haven’t heard about merit coming later.
I would not worry about that!
Boiler up!
Interesting about what you were told by housing. I haven’t heard or read that other than shifting from may 5th to mid April.
The FAQ in the housing portal goes further to say that between April 15 and May 5th students can still get into the Purdue apartments. After 5/5 it’s wait list for housing.