I have the same issue with my navigation, at one time I had a bunch of crossed forks/knives all over the map after looking up a restaurant. I have noticed that they disappear if I use the 1/2 mile scale, they seem to show up on the 1/4 mile and smaller scales. I did "correct" the problem by looking up the nearest BMW dealership, that way only those icons show up and they're few and far between. Not a fix, but it helps.