@KirstenJ,

I would always recommend rebooting your whole network when issues arise, however, parental controls are managed by the main node and rebooting the main node should suffice.

I would first check to see if there are any unknown devices, or if you can, see if the Private Addressing Feature for your home Wi-Fi is enabled on your daughter's phone, as this would cause your phone to appear as a new device to the router.

If the issue is simply that the time continues to count up when the device is not in use, this would most likely be a result of the background traffic needed by the phone maintaining the connection with the internet for things such as notifications. Is the device in use while it is accruing time, or is it idle and still accruing time?

Apologies in advance if i did not understand your situation.