Just to add some confusion to how fee-waivers are decided; I don't have a reportable GPA (foreign) and I've received unsolicited fee waivers from Penn, Cornell, Vanderbilt, UCLA, as well as some lower-ranked schools.
Agreed with @MissChanandler . Also some schools like USC apparently only have 5 LSAT slots on their drop-down menu so I guess that's your upper limit as a general guide lol
Yes, you can definitely ask them to. I did the same thing last year, and only one school pushed back (USC) and said that they would hold it incomplete until that score was in. The others all said "ok, we'll mark it complete, thanks" and that was that.
I generally looked around on the websites to see how they reference it themselves. Most schools use things like Berkeley Law, Northwestern Law, UCLA Law and I used those versions when necessary.