you'd be surprised how indica ALLEGEDLY pure sativa durban poison & burmese can look.
not all sativas have razor thin leaves. this isn't the broadest leaved durban i've seen and there's even stil pics of wider leaves online, but they don't link to full scale. i've grown very stinky stoner bag seed with leaves at least this narrow.
OH! THIS is what my pack of aborts and mutants that never made it past 2 leafesets was SUPPOSED to look like!
it was looking like your first leafset got trapped inside your cups and maybe the leaves got waterlogged, but whatever happened, it's growing vigorously now. older beans sometimes start a little rough too.
i wanted to see how you fit 3 plants in a tiny PC box even with LED lighting. i've heard of PC grows but never saw any pics. thanks for posting. it'll be interesting seeing you get a harvest.