The mail is just f-ed up. Sometimes you get letters on a fairly regular timeframe (from what I could tell, it SHOULD have taken about 4-5 days for letters to get cross-country to me), but sometimes they'd be just insanely late/early. It was weird.
And, yeah, your letters are probably just behind. I think the first whole month of BC, my letters were crossed up with DB's, and neither of us had the right letter when we were writing. It was insane.
It'll get better though.