After checking with ResLife (Residence Life), I still don’t have a much better answer. They said that more information will be sent out to students who accept admission. I know that you have to go through bedloft.com to have it done, but I don’t know about how late is too late.
You should know your housing assignment by the middle of July (at least that was when we all learned) and I would think that you could still order a loft for a few weeks after this. I’ll keep looking for answers.