Hidden requirement?

I'm on the America task near the end of the game that asks you to do a week of shows, each of which must be over 1,500 impression and that the artists may make no more than 5 mistakes over the course of the week.

I do all of that, but buddy pops up to tell me that I've failed anyway.

I did it a few times because I started to worry I couldn't count to five (The first time I'd had exactly five failures so I thought maybe I missed one) but now I've had two seperate occasions on which all shows have been over 1,500, there's been an afternoon and evening show and the total of failures and injuries has been no more than 4 (In case they meant to say 5 or over)

Is there some extra requirement for completing this task that I've missed?