Please HELP - Mines not appearing!

[iambecomelife]

Hello; I have been designing some single missions in the editor to test new features & ships. About 95% of the time when I try to place a minefield, no mines appear! Could someone please post a step-by-step guide to creating a minefield? Here's what I have been doing:

1) Setting mine density, height, and date of creation
2) adding a waypoint away from the mine icon
3) adding more waypoints.

I see a row of circles in the mission editor that seem to indicate that there are mines, but when I launch the game there are none.

Thanks, and please try to be as specific as possible.