symmetric_matrix=False doesn't seem to work well with the CLI

[pfebrer]

I have yet to investigate what's going on, but it seems like some part of the code doesn't realize that symmetric_matrix has been set to False and you have an incorrect number of edge labels.

I open this issue just to don't forget about it.

[pfebrer]

I think this should be fixed now with fb53e0f, will test and close the issue when I have time.