Oncidium Alliance genus specification/explanation

[Argentum]

I purchases an orchid at Trader Joe's a couple days ago. Slightly herbal fragrant, my first impression was Oncidium, flat/round slightly wrinkled pseudobulbs with normal purplish speckling, dark purple flower spike stem with maroon flowers that have vivid yellow petal tips and lighter yellow lower skirt in branched sprays. Beautiful plant. After poring over image searches, I'm pretty sure I know what it is:

Wildcat 'Rainbow'. However, that's where I got confused, because the Wildcat 'Rainbow' cultivar is listed as all of the following genera depending on the site accessed:

Oncidium, Odontocidium, Colmanara, and Oncostele.

So I figured out the cultivar, but not the genus? I know the differences between the different options are basically what went into making it, and that they all fall under 'Oncidium Alliance', but I'm hoping someone can help me figure out... if they are all interchangeable, if some are outdated classifications, and what the devil it should actually be called!

Regardless, once it's done being quarantined it's going to be a perfect giant surrounded by my collection of tiny Twinkles. And yes, I do quarantine strictly. I may be a beginner, but I've already encountered what would have been a mealyworm disaster if I hadn't!