Problem/Bug Group.yml help

Hi i'm new to the permission files I have set up the nodes for permissions and when people join my server they have creative mode and can fly idk if I have messed up the permission and groups file and its a survival server so I have no idea what the problem is sorry I really noob at this if someone could help me asap I would really appreciated it.
Group file
groups:
Moderator:
default: false
permissions:
- essentials.signs.use.warp
inheritance:
- builder
- g:groupmanager_moderator
- g:bukkit_moderator
- g:essentials_moderator
- g:towny_moderator
- g:vanish_moderator
info:
build: true
prefix: '&5'
suffix: ''
Owner:
default: false
permissions:
- -vanish.*
- '*'
inheritance:
- admin
info:
build: true
prefix: '&4'
suffix: ''
Builder:
default: true
permissions:
- essentials.afk
- essentials.afk.auto
- essentials.balance
- essentials.compass
- essentials.delhome
- essentials.hat
- essentials.home
- essentials.kit
- essentials.kit.tools
- essentials.mail
- essentials.mail.send
- essentials.msg
- essentials.pay
- essentials.sethome
- essentials.sethome.bed
- essentials.signs.use*
- essentials.signs.use.warp
- essentials.spawn
- essentials.tpa
- essentials.tpaccept
- essentials.tpdeny
- essentials.warp
- essentials.warp.list
inheritance:
- default
- g:essentials_builder
- g:towny_builder
info:
build: true
prefix: '&2'
suffix: ''
Admin:
default: false
permissions: []
inheritance:
- moderator
- g:groupmanager_admin
- g:bukkit_admin
- g:essentials_admin
- g:towny_admin
- g:vanish_admin
info:
build: true
prefix: '&c'
suffix: ''
Default:
default: false
permissions:
- -bukkit.command.kill
- essentials.warp
inheritance:
- g:groupmanager_default
- g:bukkit_default
- g:essentials_default
- g:towny_default
info:
build: false
prefix: '&e'
suffix: ''

 

it needs to be
info:
prefix:
build:
suffix:

 

And go into your server.properties you could have accidentally set it so the default game mode is creative instead of survival @Drtekkerz