You can legitimately move a wayspot from an OK position to a better position. An example is a wayspot in the middle of a football field can be moved to the edge. This is seen as improving the accuracy of the map.
You cannot legitimately move a wayspot from a good position to a just-as-good position. An example is a wayspot on the edge of a football field cannot be moved to somewhere else on the edge. This is seen as manipulating the map for gameplay reasons.
To avoid this problem, for wayspots that have a legitimate choice of where to put in the pin, such as a football field you can use the cell boundaries to make your initial placement. For wayspots that don’t have a choice, such as a sign, you cannot legitimately nudge it based on the cell boundaries.