Seems like old problem have returned :). Outlook groupby, add one column group, make header border solid. Row selector, first and second columns have non-matching borders, other columns are misaligned with headers (screenshot below). Is there a workaround available for that?
What version of the controls are you using?
Can you duplicate this behavior in a small sample project?
WinForms 2010 vol3 (trial), sample solution attached