Rotting Blc., Rlc., or C. Waianae Leopard 'Ching Hua' seedling

[SpclK]

I received a Blc., Rlc., C., whatever it is now... Waianae Leopard 'Ching Hua' seedling (Quit changing the name! LOL) as a party favor at our society's 2018 Christmas Party. The media was good at the time; it looked to be the cattleya mix from repotme.com, so I didn't mess with it. I had some previous experience with phals (bought my first one in 2014 or 15), but this is my third cattleya-ish orchid so I didn't know it was actually a seedling with four pseudobulbs until very recently when looking at some photos our OB members here posted. Oy vey! The seedling has a long ways to go.

The orchid either climbed out of its pot or was knocked over and put back into pot in same media due to time constraints within the week or last. The media is now smelling like the mushroomy, broken-down bark smell so it desperately needs a repot or mount of some kind. It's on its very last leg (rot has taken 4/5 pseudobulbs, leaves, and I suspect roots leaving only the new growth with one leaf and a very short root. Pictures to follow soon when I figure out how to upload them (Thanks to SouthPark for detailed instructions!). I'll post the photos later tonight or tomorrow morning.

Culture and conditions:
Light: 22 in. away from a SSW-facing 73-84 in. high window; bottom of window sits 2-3 ft. from the ground. Window has thin white curtains; swag covering top 1/2 of upper window, tier covering all lower window. Table top sits 3 ft. above the floor. Oncidiums shade Waianae Leopard during the summer.
Temp and humidity: Winter D 68°F 45-50% N 65°F 45-50%; Summer D 78-84°F (with central air) 50-60%+ N 80°F 45-60%. Currently 71°F 45% on a cloudy day with low light with no supplemental light.
Water: Previously used spring water from artesian well but changed a few months ago to RO water; soaked plastic slotted pot in water for 5-15 min. 1-2 x's weekly letting it dry slightly between waterings, flushing regularly.
Fertilizer: Eh... none at the moment... bag of what was believed to be a half-filled sandwich bag of MSU fertilizer was placed accidentally in a pool of spilled water on the countertop; I put the bag on a hot-air register to dry and the contents became a slushy, watery mess and was thrown out. I was going to make homemade organic fertilizer but haven't got around to making it yet.
Media: Looks to be Cattleya mix from repotme.com; it's now least about 12-15 mos. old now and smelly so needs repotting.