The older pbulb does that when a new one is developing...don't worry about it. And, don't remove it! The plant is using the stored energy in that pbulb to continue to develop the newest growth.
The newer growth does look like it's still maturing. Did you repot? Is that how you know the roots are bad? If so, no big deal at this point but, for future reference, never repot a Ctsm at this stage of growth. It's best to repot them during their dormancy or, at the latest, just as new growth begins in the late winter/spring. You want to do it before those new roots get going so you don't damage them.
I would continue to water...until the leaves show signs of going dormant...and then begin reducing your waterings. The roots may look bad but they are likely still absorbing at least some moisture. You can also continue to fertilize until you see those leaves starting to turn. And, give it as much light as you can. When the leaves start to show signs of dormancy, then reduce water and stop the fert.
I've received Ctsm that looked much worse and they went on to do well the next growing season. It's big enough at this point that even if the root loss causes an early dormancy...it should still be fine next cycle.
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