Missouri dual is after 2/20. Here's a screenshot I pulled from the pre-championships manual last week
Unless it is written really poorly (which it might be, there's ambiguous stuff in NCAA pubs all the time - for example they don't list when the coaches panel dates will be even though there's no reason for them not to) that says that the snapshot of the season they use for allocations happens on 2/20. So while the UNI and Missouri duals matter for seeding at Big XIIs and NCAAs, and for wild cards, they wouldn't matter for allocations.
Cheer as hard as you can for Mossing though, if he can move up a couple of spots in the rankings and earn the Big XII an allocation that'd be a big boost for Straw.