My Phal repotting problems!

[glitchathon]

So i have 2 phals that I repotted 2 weeks ago. I used Better Gro Phal mix which contains fir bark, charcoal, perlite, and peat moss pieces. I throw out most of the peat chunks and select the best pieces of the bark.
I also added a small 20% or so amount of sphagnum moss (NZ AAA stuff) to one of the orchid #1 which was previously in bark. And I used 60% sphag and 40% phal mix for orchid #2 which was previously in sphag.

Details of Orchid 1:
- Bought at Trader Joe's 4+ years ago. Bloomed every year. Potted in bark mix.
- Never repotted so media was pretty decomposed
- During repotting, 50% of roots were rotted, majority of good roots were aerial.
- I cut the rotted roots.
- Many roots were broken or had rotted areas, but had healthy extensions, so I kept those.
- Used sterilized scissors and cinnamon to protect from fungus.

Details of Orchid 2:
- Bought at Costco 6 months ago.
- Potted in 100% sphagnum moss, packed tight and very difficult to dry even after a week or two.
- about 30% of the roots were rotted. I cut those.
- Also had some fairly unhealthy roots but had healthy extensions or growth on the ends, so I kept those.
- Used sterilized scissors and cinnamon to protect from fungus.

Two weeks later...

Orchid 1:
- has some little white egg-like fungi or mold growing on the tips of the rotting roots.
- I decided to unpot it and inspect and clean them up.
- I find half the roots were now rotted! There is still healthy roots and good signs of root growth. But many of the old roots rotted real quickly during the 2 weeks after the repot.
- I cut off all bad roots and went even further and cut off those that had significant rotted areas even if other portions were healthy. Removed all fungus areas.
- Used all new media and repotted it in a smaller pot (since now there are fewer roots).

Orchid 2:
- No fungus but also had a large portion of previously healthy roots rot. So I unpotted and did same as above, going into fresh media into a smaller pot.

Is it normal to have a lot of rotted roots so shortly after a repot? Did i do the right thing going in and cleaning it up?

Is it possible the Better Gro mix is bad? The bark quality was kind of dark and wettish. How dry/fresh is it supposed to be? The stuff dried pretty quickly and I found the mix to get nearly bone dry within 4 days in the hot summer (it is on a windowsill with partial shade but we have no A/C so temps were 83 deg or so).

Thanks for any advice you can offer! I hope these Phals will recover!