Bukkit

What steps will reproduce the problem?
1. Give a job a certain permission at level 1
2. Revoke that permission on level 10 (false)

What is the expected output? What do you see instead?
I want the player to have a certain permission on level 1, and then remove it on level 10 (to give them something other instead).
But instead the player won't even have that permission on level 1. So there's a problem how permissions are read/refreshed.

What version of the product are you using?
Jobs 2.55.0

Do you have an error log of what happened?
mypermission.1:
        value: true
        level: 0
mypermission.1:
        value: false
        level: 10
mypermission.2:
        value: true
        level: 10

=> The player won't have the permission at all.

Please provide any additional information below.
Is it possible to negate the permission itself ???
It will look like this :
mypermission.1:
        value: true
        level: 0
-mypermission.1:
        value: true
        level: 10
mypermission.2:
        value: true
        level: 10

Since I use bpermissions, I don't know if I should use the ^ sign, as this is used to negate permissions.

Edit: I tried to negate the permission with - and ^ , it doesn't work. And another little question, is there a way to execute a command (console) when a player reaches a certain level ? (However this feature won't fix my problem.)

you can use commands variable instead of permissions as with thos can be some issues with different permission plugins.

    # Commands executed when player reached level
    commands:
      # command name, just to have better idea what this do
      fly:
        # Command its self, this will be executed from console, so all commands should work
        # Possible variables are: [player] [jobname] [oldlevel] [newlevel]
        command: manuaddp [player] essentials.fly
        # When to execute this command first time
        levelFrom: 100
        # Until when to do this command
        # This can be set to same level as levelFrom, so this command will be executed only once
        levelUntil: 100
      kit:
        command: manuaddp [player] essentials.kits.woodcutter
        levelFrom: 150
        levelUntil: 150

with this you can perform some commands when reaching particular level of that job. You can use this one to, to set default permissions when joining jobs

    cmd-on-join:
    - 'msg [name] Thx for joining this job!'
    - 'msg [name] Now start working and get money from [jobname] job!'

check this link https://github.com/Zrips/Jobs/blob/master/jobConfig.yml there is up to date possible ways to play around with jobConfig file to get best possible result you want