Thank you for the additional information, Don.
Given your age, if you are also being treated less favorably than similarly situated but significantly younger employees, that would typically raise an inference of age discrimination in violation of state and federal laws.
The proper course of action would normally involve attempting to resolve the situation internally with the employer, usually through the HR department. If the matter is not promptly resolved, then a charge should typically be filed with the state Fair Employment and Housing Commission.
It is best to consult further with a local employment law attorney as well if you wish to protect your legal rights, so the attorney can be ready to respond if the employer attempts to retaliate against you for asserting your rights.
Here is a link to the state FEHC's website which provides more information on this issue:
I hope you found my answer helpful, even if the law is not in your favor. I would be happy to clarify my answer if anything is not clear or you are looking for additional information. All the best to you!