As much as PM is inconvenient (my daughter is in PM at Sheung Wan), I don't think you have much choice. I highly doubt you would find a parent who would want to swap from AM, and I am pretty sure the school doesn't willingly just swap students.
You just have to find ways to make the PM session work for you. It isn't easy, but you will manage.
You just have to find ways to make the PM session work for you. It isn't easy, but you will manage.