Bad modules, bad unit tests. I think what has happened is something in the atom typing or the aromaticity changed but the MCS is correct for these molecules seems correct from inspection (spent over an hour looking at this). The original bug report shows there were different counts due to some flags being set/unset etc and I think this is just a case where we handle things a little better. The first molecule here is actually invalid - someone has use the daylight-like aromaticity model to generate a molfile. As the MDL aromaticity model doesn't allow lone pair contribution it's impossible to know which nitrogen on the 6 member ring had the hydrogen. Depending on which nitrogen I choose I get different MCS counts.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>