So i don't see any pictures that give a look at the preflowers. There's no obvious sex showing in these pictures. you need a zoomed in pic at a branch... if you stilll have symmetrical growth, you'll have 2 preflowers at every node. at this point with an autoflower, the preflowers should be showing at the least... if oyu see 1 nub with white hair, all is well... if oyu see what looks like a bunch of little grapes that project from a twig-like thing.. very small twig, but overtly different than development of female preflowers.. use google,,, it's incredibly obvious once you learn the differences. just a matter of patience for the preflower to show up.
a xx x xx can never be male... but if the area is contaminated with unintended pollen, it could produce an XY(male) from regular pollen that shouldn't be there.
autoflowers -- there's a process where 99% or more are autos? i'd have to see the alleles involved and generations and whether you can say 100% or not... so i'm being a bit hestant to say anything with conviction, but it should be rare... and that rare occurence could be from foreign pollen like above... or maybe it's a matter of probability due to what is going on with genetics.
e.g. xx x xy will give you 1:1 xx:xy. a heterozygous trait x heterozygous trait (1 dominant allele 1 recessive to display a physical trait) will give you 3:1 dominant to recessive. 2 of the dominant resulting trait will by heterozygous... you'd have to work backward from its progeny to determine which ones they are without some fancy genetic testing in a fancy lab. these are simple examples.. somethings are a spectrum, like human height or probably plant height too. so, some things can be said with confidence like "xx" x "xx" can absolutely never, never, never results in an XY pairiing, ever... never never never... so when it happens it is contamination for sure. gettingn an autoflower is a bit more complexe with more alleles invovled, so i'd wager it's just a very high % based on how they do it... if they do it correctly.
those taking shortcuts may end up with a much lower % autoflower trait resulting.