I interpreted it as two fives in US AP courses (not AP USH) as per post #93. And if they don’t specify which courses then any 2 of the 3 you are taking is fine. In other words five 5s total.
On a re-read, I agree with @Twoin18 - I assumed it was USHx. Two more 5s.
Update on AP scores: I got a 5 in AP Euro and another 5 in AP Macro thus meeting the conditions for LSE. Collegeboard sent my report on June 24th to LSE but I am yet to receive an unconditional offer. Quite nervous and anxious!
Congrats, @bestuni2019! no need to worry- most of the staff is probably is on holiday. From their point of view, this is the quiet before the storm: A-level results come out 15 August 