The other Limited users were setup as Limited and this has never changed. I am the administrator and I have 3 limited users.
I created another limited user account (named test) and turned on Image Filtering and Age Appropriate Searching then set the Content Rating to Younger Teen and saved it. When I logged off of my administrator account and went into the new limited user account (test) I could access the Parental Control settings screen and the settings were off for both Image Filtering and Age Appropriate Searching and the Content Rating was at Adult. I logged off of the test account and went back into my administrator account and the settings for test were off, off, and adult.
I also performed a reboot rather than a logoff after configuring the settings and this came back with the same results.
So now I am at a loss. Could one of my limited users install a program to circumvent Parental Control settings?