I'm in Calvin's commentary doing work on Mark 2:23ff. I noticed that the commentary is not actually matching up with the text. I checked my hard copy to see if the problem was there, but it isn't. The passage in question goes with Matthew 12, so the heading is correct, but the comments are from Matthew 11:25ff. I think the "break" begins at 'Matthew 10:16-19; Luke 7:29-35' as this appears to be a second heading for Matthew 10 that is not parallel to Luke 7:29-35.
Hope this makes sense.