Wow, what a mess!!
- If the matter arising from the “outburst” was not on the Meeting Agenda, then it cannot form part of the proceedings and should not have been minuted.
- Confirmation of the Minutes means that they're correct in all respects (which they're apparently not), and yes … if they are confirmed that does mean that whatever has been minuted about the “outburst” is correct.
If everything is as you say, then you should not confirm the Minutes and instead ask for those to be amended by deleting all references to the subject “outburst”