Yes under most circumstances the age does change automatically.
If the age does not change by the end of the day - they best way to address the glitch would be to open
a help ticket:
This can be accomplished by clicking on the "gear" icon in the top right corner of the blue menu bar at the top of every CM page. From there you can choose the "Help" option. From the help page that pops up, if you scroll to the bottom you will find a button labeled "Submit a Help Ticket".Either that or you have just found CM's version of the fountain of youth
I am sure the staff of CM will be more than willing to help correct the problem for you.
Most women I know would do anything to have their age not increase on their profile.