wouldnt they be all fucked up since they are "siblings"

Maybe just a few bad sectors.

thats a stereotype, fucked up children cause of a same family mating.

Well, even though this is 23 days off, those are technically their younger/older selves, rather than their children.... note the "time paradox" tag

They are not siblings by the way,
They are mirror images,
considering they are computer programs.