Number 1 and 3 are abillities of Gil-Galad.
Number 2,4,5 and 6 are all posible.
But because the spell is nearly the same for Imladris and Arnor, I believe it is 6 and the other ones are older versions.
So just change Nr. 6 to this. Just set the count of the Gil-Galads for Bruchtal to 0:
CreateObject
    ObjectNames = ArnorGilGalad_Summoned
        Count                    = 1
        FadeIn                    = Yes
        FadeTime                = 8000
        IgnoreCommandPointLimit    = Yes
        Disposition                = ABSOLUTE_ANGLE
        DispositionAngle        = 270
        UseJustBuiltFlag        = Yes
        StartingBusyTime        = 5000
        Offset                    = X:-30 Y:-60 Z:0
        ForbiddenUpgrades = Upgrade_ImladrisFaction
        RequiredUpgrades  = Upgrade_ArnorFaction
    End
    CreateObject
    ObjectNames = BruchtalGilGalad_Summone d
        Count                    = 0
        FadeIn                    = Yes
        FadeTime                = 8000
        IgnoreCommandPointLimit    = Yes
        Disposition                = ABSOLUTE_ANGLE
        DispositionAngle        = 270
        UseJustBuiltFlag        = Yes
        StartingBusyTime        = 5000
        Offset                    = X:-30 Y:-60 Z:0
        ForbiddenUpgrades = Upgrade_ArnorFaction
        RequiredUpgrades  = Upgrade_ImladrisFaction
    End
It would be also possible to delete the whole part for Imladris, but if you want to rechange it, it is better have the old codes still there.