2 inches in the 1st month maybe ok. i don't what you did to them before you planted them so my timeline and yours maybe way off. as you said they aren't rooted yet so they haven't really established them selfs yet. i'm sure as soon as they do get a real root system going they'll grow a lot faster.
as for being dodgy, well they are growing, not as fast as you'd like but they are still growing.
you know when you take them in at night, do you put them in an area/window where they can get the morning sun too? or do you put them out at 6am and take them in after 9pm?
maybe you might like to cage them up like this
[attachment=o248110]