Don't be too quick to replant the seedlings. Nepenthes have notoriously piss-poor roots during early development; and I've kept many seedlings in the same containers for upwards of two years or more . . .
“Sì perché l'autorità dell'opinione di mille nelle scienze non val per una scintilla di ragione di un solo . . ."
-- Galileo "Biff" Galilei
I don't disturb/pot up seedlings until they are a year old, at least. As Dave said, they have weak roots at that stage.
They took off since the repot! Putting out larger leaves and starting to make bigger pitchers. All three are doing well. Will be for sale on eBay in 2015 for $20,000 per seedling. (That was a joke... Haha...)
These things actual have some serious roots for only being a few months old! I packed one up for a trade this week and it had 3 roots the same length of the largest leaf. I like this species!