I have set up NF on my daughter's laptop. She is limited to x hours per day and then the laptop is supposed to be locked. According to other threads and your documentation, she should be able to log in a couple more times, for one minute each. But after the 3rd time, the laptop should lock. This is not happening. She is still able to use the laptop in one minute increments after the daily maximum is reached. So the limits are basically useless.
Given the number of other threads on this subject, please advise on how the solution to this flaw.