Express the intended sentence
Suppose an owned demonstration library needs items from Project North that are also short enough for a briefing. That sentence requires both conditions. Kodi's editor offers all rules and one-or-more rules; selecting the alternative logic changes the eligible pool.
Use a counterexample
Identify a short item from another project and a long item from Project North. Under the intended both-required rule, neither belongs. If either appears, inspect the selected logic before adding more exclusions.
Keep ordering and limits out of this first comparison. A short result list can conceal an overbroad query by displaying only its first few matches. Review the complete membership, then restore the desired presentation limit once the logic is understood.
Save the reason with the rule
Record the plain-language requirement and the two counterexamples. When a future editor changes a condition, rerun that boundary check. It is more durable than naming the playlist after whichever operator was selected during its first draft.
Questions answered
Does one-or-more require every condition to match?
No. It permits an item that matches at least one of the rules.
Should I add a result limit to correct broad membership?
A limit changes how many matches appear, not the meaning of the selection conditions.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.