My Device Is Not Creating Waypoints In The Correct Location - Garmin GPSmap 585 Plus Owner's Manual

My device is not creating waypoints in the correct location

You can manually enter a waypoint location to transfer and share data
from one device to the next. If you have manually entered a waypoint using
coordinates, and the location of the point does not appear where the point
should be, the map datum and position format of the device may not match
the map datum and position format originally used to mark the waypoint.
Position format is the way in which the GPS receiver's position appears on
the screen. This is commonly displayed as latitude/longitude in degrees and
minutes, with options for degrees, minutes and second, degrees only, or one
of several grid formats.
Map datum is a math model which depicts a part of the surface of the earth.
Latitude and longitude lines on a paper map are referenced to a specific map
datum.
1 Find out which map datum and position format was used when the original
waypoint was created.
If the original waypoint was taken from a map, there should be a legend on
the map that lists the map datum and position format used to create that
map. Most often this is found near the map key.
2 Select Settings > Units.
3 Select the correct map datum and position format settings.
4 Create the waypoint again.