Insufficient daily rest and knock on infringement

Hi guys,

Seen this happen a couple of times and had one today that I couldn’t quite get my head around- hopefully someone here can clear it up for me.

Got caught in traffic on the M6 a couple of weeks ago, ended up going 11mins over a 15 to get to a safe place.

Obviously that incurs an insufficient daily rest. Finished at 1841 that day and had done 9h11 driving.

Had 9h17 off, card in again at 0358.

After an hour of driving, it’s thrown up a Daily Drive Limit Exceeded.

My understanding of it is that because I’ve not had 9 off in that first 24 hour period, my drive time hasn’t been reset and so that infringement will be triggered… BUT, if that’s the case, surely it would’ve shown up after 50 minutes driving (50+ yesterday’s 9h11= 10h01) and not 60 minutes driving (at effectively 10h11).

Is there something I’m missing here, or is it just a weird quirk of the software?