Don't worry!!!
Samething happened to my NW account. They apparently post it in 12,500 and 500 mile increments. I am missing 25,000... similar to what others have.
I called Goldpoints, they are not sure what happened. They suggested waiting for 30 days, then check with the airlines. Then you will have to fax in the frequent flyer statement to GP so they will recredit it then.