Hi,
After some days after the factory reset, the problem is Still there.
The support tell me that the parental control if attached on a device in the blocked period, the settings will be only active a day after.
But my problem is after a day all the schedule is detached from the decices.
After this reply from support, i decided to replug my old linksys router that the parental control worked fine and not with a delay of one day.
I will keep you in touch if the support find something in her labs.