I managed to recreat the bug. The problem is that, after getting the message, I give the players the opportunity to open the phone and check any contact, which as you have found out, messes up the attribution of all following messages. At that moment, you're supposed to just click on the screen to move forward and not mess around anywhere :p
But that's easy to fix, thanks for poking around and finding that out. As a reward, I'll have to make some secret easter egg path where both Pete and Jamie participate in a miss wet t-shirt contest to make those messages sort of cannon.