Oncidium Pseudobulb Division Questions

[nms1107]

I have an Oncidium that I bought last week which needed to be repotted. I took it out of the pot and it separated on its' own into 2 plants. One has 3pseudobulbs, the other has 2.

Now I've read that you should never divide into less than 5 bulbs or they won't bloom. Is that correct and if so, is there anything I can or should do with my now separated plant(s)?

Also, some of the bulbs are really 'wrinkled' with hard creases running vertically and some are smooth. Are they supposed to be one way or the other?

I'm new to orchids in general and this is my first Oncidium so any basic advice is appreciated.

Thanks much,
Dutch