Oncidium new growths constantly not good

[monivik]

So this Oncidium Sweet Sugar that I bought online last spring was not exactly the best purchase I've made.

It had rotten pseudobulbs to start with, one visible and one that I only noticed when I repotted because it was buried underneath the potting mix.

I got rid of the rotten ones, sprayed with hydrogen peroxide 3% and even put some cinnamon powder on the open wounds. Repotted it and hoped it would do better.

It made a new growth and I was super excited. But as soon as the new growth got a little bigger I noticed it was changing color to a yellowish tone, this can't be good I thought and by touching it, yeah it was too soft. The pseudobulb right next to it was also turning yellow and mushy. I repotted again got rid of the bad parts, and did the same procedure again. This time because of the location of the stuff that I cut away I had no choice but to split the plant into 2. So I got 2 separate parts. I wasn't sure that the 1 lonely pseudobulb would make it, since it was just 1. However to my surprise it started making a new growth.

So some time has passed now, and what have I started noticing... the new growth again is changing color and turning yellowish.

There must be something wrong with it, sick maybe? It cannot be over-watering, I am sure. I am keeping a close eye on this plant since I got it.

Anyway, my only hope now is that the other half, no longer attached to this part will make it. It's got a cluster of pseudobulbs and one new growth from this year.