The agreement is superseded by server rules. When they agreed to this they anticipated you being able to sit in camp and solo it and not have to zone as defined by camp rules. You were unable to do this so, by the same rules, you forfeited the camp by zoning.
Just because somebody tells you you can have a shot doesn't mean "you can zone as many times as you want we'll make sure nobody else takes it while you're gone"
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