I am having a difficult time adding waypoins beyond the first 2. I can easily create the first 2 (S & E) but adding additional ones is VERY erratic. Sometimes I tap on the map and one gets created and other times I can tap forever and nothing happens. The documentation and all the videos seems to say just create a waypoint by tapping a new location. Am i missing something here? I don't need to be connected to the A/C and R/C do I?