Atleast 3 E145's have joined the Greek register with Athens Airways over the last few months, as SX-CMA/B/C (former G-EMBH/K/L), so maybe that's part of the confusion here.
Also, as the 4 Q400's which have been with Wideroe (G-ECOB/C/E/F) return, presumably the 4 older ex-SAS ones (G-ECOV/W/Y/Z) become spare.
Maybe FlyBe see an opportunity to use them as a sub-fleet for lease, or some other opportunity. No point sending them back to SAS or Bombardier, if FlyBe can find a way to make money with them.