Seems like they are casting people while they are shooting, because he mentions october 25th, that would be a week after they began shooting, it's not that unusual though, Fishburne was cast as Noland in Predators a couple of weeks into principal photography.
But, that could also mean they maybe did delay filming to Feb. '18 after all
I wrote Dekker on Facebook about this, but didn't get a respond this time.