Since OP seems to be inactive, I went ahead and made a fix for the columns problem in 8K and above:
[Mania]
Keys: 8
HitPosition: 455
ColumnStart: 168
ColumnWidth: 64,64,64,64,64,64,64,64
ColumnLineWidth: 0,0,0,0,0,0,0,0,0
ColourColumnLine: 128,128,128,128
ScorePosition: 265
ComboPosition: 234
NoteImage0: mania-noteS
NoteImage0H: mania-noteSH
NoteImage0L: mania-noteSL
NoteImage1: mania-note2
NoteImage1H: mania-note2H
NoteImage1L: mania-note2L
NoteImage2: mania-noteS
NoteImage2H: mania-noteSH
NoteImage2L: mania-noteSL
NoteImage3: mania-note2
NoteImage3H: mania-note2H
NoteImage3L: mania-note2L
NoteImage4: mania-note2
NoteImage4H: mania-note2H
NoteImage4L: mania-note2L
NoteImage5: mania-noteS
NoteImage5H: mania-noteSH
NoteImage5L: mania-noteSL
NoteImage6: mania-note2
NoteImage6H: mania-note2H
NoteImage6L: mania-note2L
NoteImage7: mania-noteS
NoteImage7H: mania-noteSH
NoteImage7L: mania-noteSL
//
[Mania]
Keys: 9
HitPosition: 455
ColumnStart: 136
ColumnWidth: 64,64,64,64,64,64,64,64,64
ColumnLineWidth: 0,0,0,0,0,0,0,0,0,0
ColourColumnLine: 128,128,128,128
ScorePosition: 265
ComboPosition: 234
NoteImage0: mania-noteS
NoteImage0H: mania-noteSH
NoteImage0L: mania-noteSL
NoteImage1: mania-note2
NoteImage1H: mania-note2H
NoteImage1L: mania-note2L
NoteImage2: mania-noteS
NoteImage2H: mania-noteSH
NoteImage2L: mania-noteSL
NoteImage3: mania-note2
NoteImage3H: mania-note2H
NoteImage3L: mania-note2L
NoteImage4: mania-note3
NoteImage4H: mania-note3H
NoteImage4L: mania-note3L
NoteImage5: mania-note2
NoteImage5H: mania-note2H
NoteImage5L: mania-note2L
NoteImage6: mania-noteS
NoteImage6H: mania-noteSH
NoteImage6L: mania-noteSL
NoteImage7: mania-note2
NoteImage7H: mania-note2H
NoteImage7L: mania-note2L
NoteImage8: mania-noteS
NoteImage8H: mania-noteSH
NoteImage8L: mania-noteSL
Find the 8K and the 9K settings in the Skin.ini file and replace them with the lines above. You can change color of the circles switching between file names.
Sometimes it can be a little hard to read well without column lines so I added settings for the line color if you want to use column lines, to enable them replace 0,0,0,0,0,0,0,0,0,0 with 0,1,1,1,1,1,1,1,1,0.