Is 20 Pine Selling Units to Itself?

At great risk of having to change our blog name from "Downtowny" to "20Piney", we present yet another post on some curious recent sales activity happening at the ol' troubled conversion. As reported in Streeteasy and ACRIS, 20 Pine recently sold PH50 to itself for $2.86M. This unit is still listed as available for sale at around $4M. Does anyone know why the sponsor at 20 Pine would do this?

[20 Pine]