Very puzzling dendrobium

[Acharn]

I'm really surprised by this one. This was a gift from my niece's boyfriend's mother, and is actually two plants in one coconut shell. I could have taken them out when I got them a couple of years ago, but this is the way she grows them at home, so I just left them.

The things that puzzle me, she assured me that the flowers were yellow, and that it blooms in the cold season. Well, here we are four months past the very end of the cold season and these blooms suddenly appear. Secondly, how is it these blooms are coming from a keikei? Its roots aren't even two inches long yet, so I wouldn't dare separate it from the parent plant. One of three blossoms has already wilted and I don't suppose the remaining two are going to last long.

Sorry the picture isn't clearer and is confused by monopodial sharing the shell. The keikei with the blooms is at the end of the long cane going off to the right, the two canes going off to the left show the leaves. The cane bearing the keikei lost its leaves last year. Can anyone help me identify this?