I don't get it either. However, it's happened to lots of us. As far as bleeding the ABS system ..... don't mess with it unless you must. The shop that bleed mine introduced air into it and the first time I activated it on the race track was the last time I had brakes that day. I managed to get all the air out eventually. It took lots of bleeding and braking on slick surfaces, bleeding, braking on slick surfaces again, etc. BTW, the best surface I found for a though ABS cycling was grass.

Les