There's nothing funny going on at all. Today's 8k, as in Jan 23rd, refers to late last week and late last week would coincide w Jan 19th not Jan 13th.
Regarding the 8k, as simple as the explanation, received high marks in my book simply because they followed up w their Dec 8th PR. The Dec 8th PR said a possible follow-up in 2 weeks and the reason why it's taking so much longer needed to be explained. Kudos for doing that.