allMapMarkers apply {deleteMarker _x};

for "_i" from 1 to 5 do
{
  _marker = createMarker ["m_" + str _i, player];
  _marker setMarkerType "hd_dot"; 
  _marker setMarkerDrawPriority (10 - _i);
};

//Correctly sorted e.g m_5, m_4... instead of m_1, m_2...
systemChat format ["Correct Order: %1", allMapMarkers];

_marker = createMarker ["m_final", player];
_marker setMarkerType "hd_dot"; 

//incorrectly sorted
systemChat format ["Incorrect Order: %1", allMapMarkers];

//Sort allMapMarkers by priority
"m_1" setMarkerDrawPriority (markerDrawPriority "m_1");

//Correctly sorted
systemChat format ["Correct Order: %1", allMapMarkers];