i'd wager the soil is hot (nutes) or you have been feeding a seedling that had enough energy for 2 weeks packed in the seed.
so, depending on recent behaviour, eliminate the other option... either way you likely want to only water with pH 6.5-6.8 (soil i assume) and stay away from nutrients for a bit... wait for a hint of deficiency or slowdown in growth out of nowhere etc... should continually ramp up growth when healthy.
color looks fine.. seem healthy, otherwise. curling down can be nutes of overwatering, in this case i'd chalk the curld down to watering habits? if you don't let top layer dry a bit, do so now. it shouldn't be wet at all times. i wouldn't let the top 1" dry at this point, either.. but later that's a good inidcator.
ensure pH is proper.
Heat can cause the contortion you see. the twisting of leaves of more likely nutes.. so might have 2 or 3 things happening here and 2 of them you have no control over.
my 2 cents: in a week you'll forget this ever happened.. .give it pH'd water and stay out of the way unless something drastically negative starts happening...