I am also very new to this, but from what I've seen so far, I think a better approach might be to transform your data
so that you have only one set of Lat, Long columns.
I'm assuming that your [Lat1,Long1], [Lat2,Long2], [Lat3,Long3] columns describe three different types of points. So maybe something like this:
point_id point_type Lat
type_1 lat1 long2 2 .... 3 type_2 lat2 long2 4 ... 5 type_3 lat3 long3 6 ....
You can Assign different markers to the points based on point_type.
I could be totally wrong about this...