looks like you've got a male regular tiger barb and a male green tiger barb.
i think i have 3 males even though i asked for 1 male and the rest female

i have 3 (waiting to get paid to get more) a regular, green and albino and i think the albino has less vibrant fins cause he is albino

ill post a pick for you later if i can get him lol
Never trust the LFS to sex fish for you. Especially if the fish aren't livebearers
Just gotta point out the males and females yourself when you're there. It's hard to tell which is which when they're young, but as they grow older, the red markings grow much more pronounced on the males, and the females are much more wider bodied.
Ultimately keep in mind that unless you're breeding them, the genders of the tigers isn't going to change anything. I never bothered balancing the sexes on my tigers, I just picked em up and threw em in and it's good.
Even if you are breeding, though, I'm not sure how much the sexing ratio is going to matter.