transplanting is one of those things. you can do it well, with healthy plants, and every once in a while, you're going to get a pissy one, that doesn't like it. most of the time when i up pot, they might slow down for a day or two, then they're back to growing again. then there'll be that one, that even though you could swear everything went nice and smooth, acts like you tore half the roots off and stepped on the other half...so just do the best you can do, and give em' the time, if they need it.