*Press Menu 1 time to get into the Main Menu System ...
*Cursor over to the NAV tab ...
*Cursor down to Waypoints Routes Tracks ...
*Cursor right to open Waypoint Management ...
*Cursor down to highlight a waypoint name ...

Highlighting each waypoint will show that waypoint in the mini map to the right ...

Are any of your missing waypoints actually there but they just won't show on the regular Chart views ... ??

If the missing waypoints are in the list (but are just now showing in your regular Chart views) ...:

*Highlight the waypoint in the left box ...
*Cursor right to open the waypoint edit window ...
*Check if that waypoint data shows "Visible" ...

Rickie