Flybe Fleet Listings
Planespotters.net is very accurate actually. Particularly in regards to the Dash-8 listings.
Flybe has 48 Q400s operational, with two of these operating for Brussels Airlines. G-ECOH & G-ECOI.
G-JEDK has been painted white and has now been wfu, G-JEDL is next but is still flying in full cs for now.
Planespotters.net only lists aircraft on order that have known Construction Numbers. If the construction number is not known, then the aircraft is not added into the database. Just like many of the other databases on the net. It doesn't mean they're implying the airline only has 6 more on order.
So the correct numbers:
Dash8 Q400 - 48 (-1 2012)
Embraer 175 - 5 (+30 Due, around 4 of those being in 2012)
Embraer 195 - 14
Total | 67 (+ 30 Due)