Describe the bug
Deleting charts isn't actually consistent. As far as I can tell, if you delete a chart that's in a slot higher (or I guess lower? more difficult) than the chart you have selected and saved on, it may just... not actually get deleted after you save and reload the file again. The Challenge chart seems to do this the most, but it can happen with others as well.
To Reproduce
grab a simfile with multiple charts in a gamemode (preferably with all 5 difficulties)
delete every difficulty except for one (for example the medium chart)
save the simfile and open it again, either in SMEditor or anything else that can read simfiles and check the difficulty slots
Version/OS 1.0.0 Linux
Describe the bug Deleting charts isn't actually consistent. As far as I can tell, if you delete a chart that's in a slot higher (or I guess lower? more difficult) than the chart you have selected and saved on, it may just... not actually get deleted after you save and reload the file again. The Challenge chart seems to do this the most, but it can happen with others as well.
To Reproduce