zapis skrzynkowy

Witam. Mam problem z zapisem otoz nie zapisuje poprawnie mimo braku bledow.. Wadliwy fragment:
 

command /testuh [<text>] [<text>]:
    trigger:
        if player have permission "admin":
            open chest with 1 rows named "&4Itemy wym" to player
            wait 3 ticks
            format slot 0 of player with {%arg-1%.it.need.%arg-2%.0} to close
            format slot 1 of player with {%arg-1%.it.need.%arg-2%.1} to close
            format slot 2 of player with {%arg-1%.it.need.%arg-2%.2} to close
            format slot 3 of player with {%arg-1%.it.need.%arg-2%.3} to close
            format slot 4 of player with {%arg-1%.it.need.%arg-2%.4} to close
            format slot 5 of player with {%arg-1%.it.need.%arg-2%.5} to close
            format slot 6 of player with {%arg-1%.it.need.%arg-2%.6} to close
on inventory close:
    set {_nju::%player%} to 1
    set {_nju2::%player%} to 1
    loop 300 times:
        if inventory name of current inventory of player is "&4Itemy wymagane %{_nju::%player%}%.%{_nju2::%player%}%":
            set {_fia::%player%} to 0
            loop 9 times:
                set {%{_nju::%player%}%.it.need.%{_nju2::%player%}%.%{_fia::%player%}%} to slot {_fia::%player%} parsed as an integer of current inventory of player
                wait 2 tick
                if {%{_nju::%player%}%.it.need.%{_nju2::%player%}%.%{_fia::%player%}%} is air:
                    delete {%{_nju::%player%}%.it.need.%{_nju2::%player%}%.%{_fia::%player%}%}
                wait 2 tick
                send "zapisano %{%{_nju::%player%}%.it.need.%{_nju2::%player%}%.%{_fia::%player%}%}% na slot %{_fia::%player%}%"
                set {_fia::%player%} to {_fia::%player%}+1
        else:
            if {_nju2::%player%} is 4:
                set {_nju2::%player%} to 0
                set {_nju::%player%} to {_nju::%player%}+1
            set {_nju2::%player%} to {_nju2::%player%}+1

Cokolwiek tam nie ustawie tylko slot 0 jest ustawiany poprawnie w komendzie do spr.
I ps. w jaki sposób można to skrócić/zoptymalizować?