I have seen this problem before. When they sign into their account and go to the planner, the planner does not show the 4 boxes that allow you to search for keywords like normal. Instead it goes straight to a setting up a campaign.
One of the members here asked me about it on skype, but even when screen sharing, what I see when I log into my account from my computer is not what he sees when he logs into his account with his computer.
I do not know what causes the glitch, but when it happens, there is no way out, the normal adwords menu is not available. Even signing out and back in won't fix it, it goes straight to the create a campaign screen.
I was unable to help this person, and this is the second person now who I have heard with this problem.