thanks for the advice, noted and way easier and more effective

Yes, just because it worked this once doesn't mean it will always work. As you add more records your query optimizer could sort it differently.

Source: Happened in production with a report. Worked for a couple years with an implied order by, then randomly started sorting differently.

Does it really matter in this case though?

It certainly is

Thanks! Much appreciated!

FYI: Instead of

if condition:
    return True
else:
    return False

you can write

return condition

or (if condition is bool-ish and the return type must be boolean)

return bool(condition)

Isn't it a better practice to specify column's names ?