...just looked at your picture again... it seems as if that plant doesn't like CHC. There are two leaves that shouldn't be dead, and another leaf that is browning at the ends. You may want to consider repotting now or after the plant blooms into some other medium. Perhaps a nice sphagnum moss with a fine bark media on top would work nice...
The plant wouldn't loose or stress the spike if you repot at this time, they are pretty resiliant...
If you repot when there is a flower or buds that are visible, then you may loose that bud or flower, but usually not.
-Pat