Tarkin and Krennic: Are we headed for a continuity error or a "Rogue One" cameo? ["Tarkin" and "Rogue One" spoilers possible]

If you've read the novel "Tarkin" (which I highly recommend, by the way), you'll know that our old friend Grand Moff Wilhuff Tarkin was placed in full control of the Death Star project after proving himself to his long-time mentor, Emperor Palpatine.

Director Orson Krennic, the proto-Tarkin looking, cloak-rocking Imperial badass set to appear in "Rogue One" and the "Catalyst" prequel novel, is said to be in charge of the Death Star project.

What's going on here? Is Tarkin in charge or is Krennic in charge? Is this confusion a prelude to one of the first major continuity errors in the New Canon or is it setting up a "Rogue One" cameo for everyone's favorite dry Imperial officer, Willy Tarks?