Hello, one of my seedlings (In pictures) is lookin...

Hello ! The 1st overwatering sign is the droopy leaves and from what I can see your leaves aren't droopy or are no more droopy ( if it was the case ) what makes me think that your overwatering issue is behind you now. Concerning the "praying leaves" this is a sign of toom much heat or a too low humidity level or both. From what I can see you temperatures seems to be perfect but How far is the light from the top ? is the temp the same at the top of the plant ? it's common to have an higher temps around the light than in the box . Concerning your humidity you should be around 80% (70% mini but 80% is better ) and I can read 43% which is way too low so you should try to grab a humidifier to get the RH higher. I think that the praying leaves + the yellow colour and tips burn ( or starting to ) is due to the low humidity + the fact that she need to recover from the over watering which makes the nutrients absorbtion harder than usual. I hope it will help you