As already mentioned, there is nothing wrong with this. You must have either recently chosen to access this information, or never spotted that the up/down buttons on the image playback rotate around the different view options you have set in the menu.
It surprised me the first time, when I was new - "Why do I suddenly have a histogram taking up most of the space & just a teeny picture?"
Menu button > Playback menu [first icon] > Playback Display options. Check or uncheck as you wish. These are the ones you will be able to step through with the up/down buttons in playback view. The one you have in the image is Shooting Data, which is itself about 3 pages of up/down button.
Personally, I find the useful ones to be none, histogram & overview. That leaves you actually with 4 pages, as you can't switch the default off, a pretty useless one with a tiny overlay ay the bottom, then a full histogram showing each colour separately, lastly the more important details of the shot.