Welcome to Tropical Fish Keeping forum, and to the hobby too.
We have some very knowledgeable and experienced cichlid keepers who may be able to offer you some specific information; as I am not one of these, my comments will be more general.
With most all cichlids, it can be difficult to introduce new fish of that species into a tank where one (or more) of the species has become established. Cichlids tend to view the tank as "their space," and new fish are intruders into their territories. This might be the issue here; in nature the resident fish would simply drive the other(s0 away, but that is not going to occur within the confines of an aquarium. The solution is obviously to remove the newcomers. But as I say, other members with more experience with this fish may have more to offer. By the way, I said "in nature" but of course the Blood parrot cichlid
is not a true species; it is man-made from one or two different species (this too is not certain according to most sources). But regardless, the inherent traits of the parent cichlid species, whatever they may be, will still be present.
I would just mention that attaining a size of 6-8 inches is going to crowd a 50g with three of these fish, and on this account I would also consider removing the two newcomers.