Seedling problems? Help!!!

Ok I know there's probly no reason to freak out but I came home today after a hard days work and my seedlings have sprouted a little root out the bottom of the rockwool one little root. There's three seedlings and only two have a root one looks like it dryed up the tip of it ? The rockwool is still wet so I'm not sure what to do other than ask you guys. Would it be fine if I transplanted the two into party cups full of foxfarm ocean forest soil? Then water the soil so there's something there to keep them from drying out completly? Or is it to soon because even though there's two little roots they've only been growing for one week now.

as soon as my seeds pop i put them in wet dirt and let em grow.

plant them into perlite,if its going into a party cup put a pencil sized hole about an inch from the bottom and just water it when ever you want just don't let the bottom inch get dry.

Cool but there in rockwool already sprouted first real leaf and feeder root so I'm putting them in party cups full of soil and should I Waite till they dry out a bit till I water them again?