Clearly too much pressure. It's hard to resist the temptations to bear down on those difficult spots. Instead try stretching your skin in those spots so that the area around your jawline is temporarily where your lower cheek would be. Focus on beard reduction and in short order you'll see great improvements.
In the short term as you shave over the next few days, when you lather touch each inflamed bum with the tip of your finger so that you can see it through the lather and shave around it. Running a sharp blade over such an inflamed raised area is sure to hinder it's healing.
Failed 2014 Shave Sabbatical - Feb. 27, 2014