[Rainrider]

I believe you are supposed to spawn your frames from within oUF:Factory. Something like that:

oUF:RegisterStyle("oUF_ClamsodaParty", PartyStyle)
 
oUF:Factory(function(self)
        self:SetActiveStyle("oUF_ClamsodaParty")
 
        local party = oUF:SpawnHeader("oUF_ClamsodaParty", nil, customVisibility,
                "oUF-initialConfigFunction", initialConfigFunction,
                "template",             "oUF_ClamsodaPartyPets",
                "showParty",            true,
                "columnAnchorPoint",    "BOTTOM",
                "point",                "BOTTOM",
                "yOffset",              41
        )
 
        -- Why doesn't this anchor perfectly?
        party:SetPoint("BOTTOMRIGHT", oUF_ClamsodaPlayer, "BOTTOMLEFT", -16, 0)
end)