Issue with overlapping TMA

[IanMayo]

An analyst is doing single-sided TMA, using stacked dots.

He got his data in a pickle, such that he couldn't drag tracks around.

One causal factor could be that some TMA legs had overlapping start/end points.

This can be created by selecting, say, 10 cuts, and creating a TMA leg from them. Then take the last cut, plus another 9 following ones, and generate another TMA leg. It's probably necessary to put these legs into the same secondary track.

Try to reproduce the error using the above steps, and fix.