The selfish evil of altruism and the virtuous altruism of selfishness?

Ayn Rand says altruism is evil and selfishness is virtuous but she also says those that advocate altruistic values of equality in fact only serve selfish interests by attempting to establish themselves as ostensibly morally superior and therefore unequal while she simultaneously appears to suggest that those that pursue selfish interests uphold some lofty altruism but does that not then mean that evil altruism is also virtuous by virtue of its selfish altruism while virtuous selfishness is also evil by virtue of its altruistic selfishness? It seems to me that if altruism is an evil motivated by selfishness and selfishness is a virtue determined by altruism then the altruism of virtuous selfishness is evil while the selfishness of evil altruism is virtuous. Oh, I’m so confused! Does anyone out there know of some secret Ayn Rand algorithm that explains how to apply ‘virtue’ always only to laissez-faire capitalism and ‘evil’ always only to social cooperation? (I know that’s the way it’s supposed to work but I just can’t seem to figure it out by myself.)