Yeah that’s true.
My Security Status was +5.85 after I completed the 2 special Concord Agents and sometime after the Odyssey Expansion of June 2013 split up Concord Standing and Security Status, I noticed my status had been lowered to +5.76 to which I filed a Support Ticket in early 2014 which wasn’t resolved so I refiled it again in 2016.
According to CCP - Having a security status higher than 5.00 is not intended, it is no longer achievable using in game mechanic and it doesn’t serve any purpose in game… Also their logs now only go back to 2014 and if they can’t verify it was due to a bug with their logs, they won’t change it.
After requesting the Ticket be escalated to a Senior GM and pressing the point that restoring my Security Status back to +5.85 would have no bearing on the game other than being used as roleplay bragging rights, they somehow came up with an explanation for why my status was lowered.
According to them, in Oct 2013 while running an expedition escalation site in Low Sec space, I destroyed a wreck belonging to a fleet mate which caused my status to drop. Very convenient explanation since they earlier said their logs only went back to 2014. I actually don’t remember that happening but since I can’t confirm or deny that allegation, I accepted that reason for the -0.09 drop in my Security Status.