Your orchid is a Phalaenopsis and it is in bad shape. It has rot, and there is not much you can do to save it.
Please read our thread here in the Orchid Forums entitled Growing Supermarket Orchids-Phalaenopsis. It may help you in the future.
The brown stick, the old bloom spike is dead and is not coming back. It should be completely removed.
Your orchid seems to have very little in the way of live roots. There is very little water being absorbed by the roots hence the new leaf can't be supported and it is dying back, getting soft and yellow looking!
You repotted into media, the bark with chunks that are too large and open making it difficult for it to hold enough water long enough to bring the plant back. Your pot is too large for the root system, what little of it there is. Most
Likely the plant needed to be repotted 2-3 months ago. Even with experience with growing Phalaenopsis, this plant will be difficult to save.
If you go to the American Orchid Societies web site, www.aos.org, at the top of the page, there are free downloadable and printable culture sheets including one on Phalaenopsis. This might be of help in the future. They are located within one of the pull downs.
Your root system suffered so much and died back that no one can accurately say whether it was underwatered or overwatered because in both instances, the roots die!
My suggestion to you would be to throw it away and start over but only if you are armed with the knowledge that I have suggested.
Continue to read through our forums on orchids, read and learn. But I am sorry, there isn't much hope for that plant.
