This may already have been answered, but once a tile is placed down how do you flip it over to utilize the reverse side of the tile. I have been unable to figure this out. At first I thought it would show each side separately in the selection scroll. However I only appear to be able to use the A side of each tile and have no access to the B sides of them. Any insight would be appreciated.

When selecting tiles, there's a tool bar at the rigth that says "Indoor Tiles" and "Outdoor Tiles". There you should click in order to select the backside of any tile you want.

If only A side appears, then select the "Outdoor Tiles" button and you will find the reverse of the tile you are using.

I hope I helped.