problem after resetting users counter

hi,
I am using v6.37.5 user-manager with hotspot.
I have created users in user-man with daily quota. For example ,some users have (250 MB per day / every day),others have (500 MB per day / every day)
I am using this following script at 00:01 clock to reset the counters:

/tool user-manager user reset-counter [/tool user-manager user find where customer="admin"]

the problem that when I come to my office in the morning I always find some users with no profile!!!
I have to assign the profile manually, so that is a big problem if I arrive late to my work, some users with no profile can’t access to the internet unless I assign the profiles again manually!!
check the following screen

and this is the limitations for the profiles

can some one help me!! what I am doing is wrong!!
I am sorry for my bad english.