As to the Rosy Sunset, I'm not sure what I should be looking at ?
Oncidiums don't generally get new growth (new buds, keikis) on previously bloomed spikes. Some genera within the alliance can - Psychopsis, Tolumnia. I see the *remnants* (sorry, I don't know the word for this) from where the buds developed off the spike. But I'm not sure if this is what you refer to.
The Misty Highland - I can see psuedobulbs ... ?
There are some Oncidium alliance (again, Tolumnia, for one, at least) where the psuedobulbs may be hidden within the leaves, but that doesn't seem to be the case here - perhaps a photo from the side might be in order
I added your photos to your post, to make it easier for other members to see them, and hopefully be able to offer opinions/advice