Thank you for your insightftul, well thought out post. I look forward to your contributions to this forum. I know Brown Cafe will be better for you being here and adding to the discussion. I for one have grown as a person after reading the above.
One more note about this...
Because you were "required" to work the additional shift, you are "required" to be paid overtime, time and a half, for working more than 5 hours.
Our supes look for "volunteers" to work additional shifts because they don't have to pay the overtime.