Spots on leaves and little twisted...

With the size of the plant and the size of your pots it might actually be a root-lock which means the pot is too small for the plant and the roots have nowhere to grow. Start with repotting your plants in a bigger pot (I'd pot it in a 11 liter right away) and when doing that check if the roots are tangled within themselves, if they are then gently untangle the roots before potting the plant! After you repot them give them a nice nutrient rich (N-P focused/Veg) watering with at least 20-30% of it as runoff, and don't forget to make sure the pH is balanced. Also try to use a medium with good drainage in the new pot to prevent any water damage. Hope this helps! Good luck and happy growing :)