Orchids blooming but short spikes

[Rez]

Hi there,

I have an oncidium and a miltassia. They both bloomed but the spikes were very short compared to when I bought them about 9 months ago. The miltassia's flowers looked dried out and sad to me, but the oncidium blooms themselves look fine.

- Does anyone know why these spikes are coming up so short?

Also, I have a dendrobium that I have had for about 16 months now and still hasn't bloomed. It sent up one huge cane and a smaller cane beside it and hasn't done anything since then. It has a very healthy root system. In one picture you can see something pointy that emerged a few months ago which I thought was going to be flowers, but it never developed into anything.

- Does anyone know what this is? Was it going to be a flower spike? If so, why might it have aborted and what can I do to encourage a new flower spike?

Potential helpful pieces of information:
1. I live in Florida
2. I changed apartments about 4 months ago. In the old place the orchids were in a west facing window, now they are in a south facing window.
3. The dendrobium sent up its new canes while at the old apartment.
4. You will note that the dendrobium leaves look burnt - at the old apartment I had put it outside under a shaded porch hoping that maybe if I could get it in the more natural florida environment and temperature changes it would bloom. Some how it got burnt, even in the shade

Thanks for you help!