I've also seen players accidentally end up below Dagger the same way you fell off White.
Yeah, had that happen to me- by the alternate LZ (not the one in the tower, where you spawn). The cool part was, it was during a hack, and as I was directly below the hack area, it still counted me as in the hack circle (and I could see/shoot enemies but they apparently couldn't see me). Never seen it on White before.
OP- you probably know this, but both of those weird places you ended up were enemy spawns, where you'll see enemies jump up (or down) from. Never seen a player end up there though-working as intended, I'm sure. 