sounds like your plant didn't have a big enough root ball to be transplanted...
Well, like the title says I hate transplanting! I dont recommend transplanting after watering either! That is what I did and my plant lossed atleast half the potting mix around the roots!!! The leaves are very droopy right now! Do you think my plant will make it???
As long as you didn't break the taproot, it should be fine... It gets them freed up and ready to spread through the new pot.
Lack of desire to pot up or at least not as often is why I germinate in the dark and let my sprouts get 2-3 inches tall. Bury them til just about 1/8 inch is showing in deep 6 cell pack and they are good. Last year They went from them to the garden. This year I may have to pot some up due to doubling my lights and starting a month earlier, but I will adjust. I think 1 pot up isn't too bad compared to what I see in some GLOGS.
I always water my plants with a dilute seaweed/kelp solution before and after transplanting my plants. Helps to stop any transplant shock, and the moisture keeps the rootball together IMO.