Brassia Maculata with Browning Pseudobulbs

[c.de]

Recently my boyfriend bought a Brassia Maculata from an orchid show, the plant had a little browning around the pseudobulbs to begin with but he really liked it so we got it anyway. I went away for a few days and noticed that the browning may have gotten worse after I came back. I don't really have any experience with Brassias' so I'm not sure if the browning is normal or if it's rot. I've attached photos so hopefully they work properly. Also I know the tag says Dendrobium but it had another that said Brassia.

The plant before:


The plant now:

Any advice would be appreciated