Phal. spike just... stopped growing?

[Salixx]

Hi all,

I've never really had this problem before... usually things go just dandy if I get a spike - the spike grows to blooms and all is good... or, things go terribly... the spike dies and/or buds blast...

However, I have a NoID phal that my mom gave me a couple years ago and it's typically been a very prolific bloomer. However, I moved to my new place in November when it had just started to spike. I think I may have made a mistake in that I put it in a light that received very low light - almost no direct sun and heavily shaded with nearby cedars. It had previously been in a southern window (and I mean IN it... I'm surprised it didn't burn) and got direct sun for 6+ hours a day. The spikes just... stopped growing after the move. They look healthy and green, the plant looks happy, etc, but they've both maybe grown 1/4'' in the last 6 months.

So, about a month ago, I moved it to a different window that gets a good amount of morning/early afternoon sun and probably 2 hours of direct late morning sun. I do plan on setting up a shelf soon in that window (it's one of my best windows for growing) and moving it to where it can get up to 4hrs a day of direct sun...

Anyway... what can be done? I am tempted to re-pot it since it is due for new media but I don't want to screw things up further. I give it fert (Miracle Grow Orchid) once every other week at the recommended dosage and water when the top 2-3'' of media feels dry (usually every other week currently). What do you guys think? Am I missing something?