Yeah that has happened to me too. Perhaps it has to do with the system maintenance schedule tomorrow? Hopefully they put in the instructions when they fix everything.
The Gray Cards have disappeared from my Portal as well. I'm assuming it does have something to do with maintenance and updating the system. An update would be nice; I haven't heard any new information in a while.
Given some of the information on the Gray cards was outdated and the instructions on completing them have not been released, it's probably just as well they disappeared!
Though it was really only the travel one that was out of date.
One thing you guys gotta remember is that very few appointments are out so far. Most appointments awarded so far have been through Presidential nominations, but a few MOC nominated appointments have started to trickle out. For things like the instructions for admitted applicants booklet and the Grey Cards, USMA probably isn't as concerned about making these available yet since most 2015 nominations havent even been awarded yet.
Now if the appointee instructions still aren't up in March then that's a different story. . .