Ebby,
Don't rule out the possibility that the labels might be right for both of them. I don't have a lot of experience with Oncidium types, but your plants are seedlings of a hybrid cross, and in most cases that means a lot of variation between siblings. Even to the point of being completely different colours.
Just have a look at Onc. Twinkle - which comes in yellow, red, and pink forms (and probably others as well!!) - and that cross is closer to the species than yours.