The HELIX can only display 2750 regardless of how many the SOLIX has in its internal memory ...

So in your scenario you have a total of 3741 waypoints

I have no idea how the 1159 determines which waypoints from the total SOLIX memory to display on the 1159 ...

I have no idea if the HELIX is displaying its 1000 waypoints and then 1750 from the SOLIX memory ...

There’s just no easy way without counting them one at a time from the list in the waypoint management Menu ...

With your combination of SOLIX and 1159 it may be best to turn off waypoint sharing and then if you Mark a waypoint on one unit —>> physically Mark it on the other unit also ...

Your scenario has also been reported by some users with SOLIX and HELIX waypoint sharing ...

Rickie