Miltonias sunset orange pseudobulb

[Lamia189]

Hi there again guys.
As some of you who have helped me know, I have recently received an order from shwerter with two miltonias which had fusarium. I have been pretty paranoid about weird discoloration etc in my orchids since. I also wanted to make sure that a miltonia sunset I got a few weeks ago was not infected xd so I took off the smallest pseudobulb... Soon to really regret it because half of the roots were attached to that thing. I'm guessing it was the oldest pseudobulb but it also was located far beneath the rest, so a part of it was in the media. I tried removing it just to see if there was no ring and it came off pretty easily, then I found that the base was orange. So I took out the plant to find out that majority of the roots were dead. The ones that weren't had the orange color as well. I was surprised to see that because I'm getting two new growths and I think a 3rd onevis forming too, but is also kind of orange. The biggest one is growing very quickly. So I thought the plant was very healthy. I guess I'm lucky because the new shoots with produce new roots, but I have no idea what the orange is... Is that some kind of rot?
I find myself asking alot questions on this forum xD I am still pretty inexperienced so thank you guys for all the help.