[SDPhantom]

Tables can't be sorted by keys. This is a combination of how Lua tables are stored in memory and how WoW serializes SavedVars. Lua tables are stored in two components, an array list and a hashmap. Non-array keys are stored in memory by hash and are completely random.

You need to make ITEMSCRAPESTATS into an array and put the ItemID somewhere in each entry. For example, this keeps track of items already scanned using a lookup table and adds them to the array and sorts when each entry is created.

ITEMSCRAPESTATS = {};
local ItemScrapeLookup = {};
 
local function ScrapeSort(a, b)
    return a[1] < b[1];
end
 
function ess(x)
    ES:SetHyperlink("item:"..x..":0:0:0:0:0:0:0");
    if _G["ESTooltipTextLeft2"]:GetText() then
        if not ItemScrapeLookup[x] then
            local dump = {x};
            ItemScrapeLookup[x] = dump;
            table.insert(ITEMSCRAPESTATS, dump);
            table.sort(ITEMSCRAPESTATS, ScrapeSort);
 
            print("Scraping Stats for Item Number: " .. x);
            for i=1, ES:NumLines() do
                table.insert(dump, _G["ESTooltipTextLeft" .. i]:GetText());
            end
        end
    else print("No Stats for Item Number: " .. x); end
end

Note: Ideally, you'll want to only call table.sort() once after you add all the entries. Calling it as each entry is added will eat up a lot of processing power.