It looks like that map is made by
http://www.gameandfishnetwork.com/Content/pid=5.html so they may have a newer one available. As far as the grocery store, to be honest, I'm surprised it shows stores at all.
As far as the map not showing much topo information, I don't really know what you mean. It says it has 50ft intervals for the contour lines. Does it not have that?
For the map not matching up with the screenshot, what it looks like will depend on the device/software that is displaying it, bu the underlying data should be the same.
For the SD card, just open it with a card reader and delete everything on it.
What is it you are using this map for? Like I said, I'm really surprised that it has a grocery store on it at all, though I could see that being in the POI data somewhere. Other than that though, the contours etc... should all be relatively accurate.