I reposted your questions as a quote. thing is, you have 2 diff Qs. one is whether 2 BGKs can coexist, the other is, can they be housed with CAs? both issues have been addressed by members. So far you're ignoring what a bad idea it is to put (baby) BGKs in same tank with species known to grow into Highly Aggressive fish.
It is all up to you. everybody has been very polite, that may be working against you "getting it".
Good luck.