Phal NOID - Top Broke Off

[blackvine]

OK, here is my 2nd problem child for anyone who can tell me what went wrong. ("Went" - past tense. It is dead.)

I bought this Phal NOID on 7/19/13, at a chain grocery store. It was the day we buried my beautiful dad and I wanted a white orchid so I could place a big white flower in his casket before they laid him in the ground. I am sad it died , but actually . . . not heartbroken because at least I sent him on with that gorgeous white flower.

Anyway, it had been potted in a very small flexible type pot (pic 1). That new leaf you see in pic 1 started to split as soon as it came out and others started to split. In October, I repotted in a larger pot - about 2 X the size (pic 2). It just seemed to decline and finally, about a week ago, I pulled it out of the pot and the whole top broke off. It was wet. (pics 3 and 4) I don't think I overwatered. What on earth went wrong??

Thanks, all!