Could have nothing to do with leap day. I have had non-posting of UA operated flights for days, multiple times already this year. Before anyone asks, not last minute ticketing, and no changes to the original ticketing, no SDC, no partner flights...nothing special, and yet no postings.

One I had to submit for missing miles after five "business" days; the other eventually posted itself after a few days (thought I had to do that same).

Miles will post, eventually. Sometimes a batch may have just gotten stuck.

MR to/from OGG?