Phals in spike out of season/in wrong conditions

[OrcishOrchids]

So, I got into the hobby by accident back in May when all the sad leftover mother's day phals went on discount. given that they were all in bloom at the time, I assumed they wouldn't bloom again for another year or more given their poor condition when I got them, but I now have at least 4 that have decided to put out fresh spikes.
my living conditions are NOT ideal, they sit in a south-facing window that is shaded by another building during the afternoon, and the temperature ranges from 70 at night to 80 during the afternoon. even with two humidifiers running I can only obtain about 55% humidity (curse this dry Texas air.) they are mostly potted in bark, with a few in high-grade sphagnum moss, and they get a very diluted fertilizer at every water. they all have small root systems because of misstreatment in the grocery stores, and have grown smaller set-back leaves since may.

ok, my concern is that my poor rescue phals are confused and this will set them back further, is there anything I need to do to support these flower spikes so they don't become a drain on the plants?