Because most people on this forum believe it's a bad idea to keep two bps in the same enclosure. I personally have done it successfully on a couple of occasions so I don't see what's the big deal is.
0.1 Reg. BP Het. Albino (Faye),
1.0 Albino BP (Henry),
0.1 Pastave BP Het. Pied (Kira)
1.0 Pied BP (Sam)
1.0 Bumble Bee BP (Izzy)