Noid den-phal with new growth on old cane?

[judith_arquette]

I have a noid den-phal that my husband bought me last fall from the supermarket. This poor thing has really been through the wringer but has made quite the comeback. It had no live roots so as much as it pained me to do so, I cut off the blooms, staked it and hoped for the best. I accidentally scraped off an eye trying to remove some of the old, dried leaf tissue. About a month later it started putting out another new growth which the mice in our old rental home (landlord was more of a scumlord despite the premium rent we were paying ) promptly ate. This plant is a real fighter though and somehow managed to grow 2 new canes, one of which I believe is putting out a spike. I just noticed that one of the old canes is putting out some new growth near the top of the cane. Since I know next to nothing about this plant I would really appreciate it if someone could assist me with what's going on. I was under the impression that the old canes on den-phals were really only there to help nourish the new growth...