Damaged leaves, and how do I remove spikes?

[alorindanya]

I have an Oncidium hybrida (Senora Que baila) I purchased from Lowes today that has damaged leaves and shrivaled spikes. The leaves have cuts in them, right down the center of some. I haven't repotted it yet (not sure if I should), but I have no idea of how to take care of this type since my others are Dendrobiums. Do I remove the spikes teh same way as a Den.? http://img.photobucket.com/albums/v4...s/DSCN4856.jpg and http://img.photobucket.com/albums/v4...s/DSCN4857.jpg

I also got a Cymbidium today that has a large brown spike and some brown/dried other mass (I don't know what term to describe it) that i don't know if it should be removed. http://img.photobucket.com/albums/v4...s/DSCN4848.jpg and http://img.photobucket.com/albums/v4...s/DSCN4851.jpg

THEN, one of my dendrobiums I purchased last week started getting black spots on it's leaves. Any suggestions? http://img.photobucket.com/albums/v4...s/DSCN4855.jpg