Use an example whose expected result is obvious
Imagine three invented library films: Harbour is a comedy tagged Weekend, Beacon is a drama tagged Weekend, and Orchard is an untagged comedy. Create a Movies smart playlist with a Comedy genre rule and a Weekend tag rule. Under All rules, only Harbour matches. Under One or more rules, all three match because each satisfies at least one condition. This is a worked explanation, not a claim that those films exist in a tested library.
Choose fields and operators deliberately
Kodi’s GUI editor first asks for the media type, which determines the available rule fields. Its rules reference distinguishes an exact match from a substring match. Use the Browse control for values already in the database where practical, avoiding a misspelled genre or tag. The editor’s Mixed media type is specifically for music and music videos; it is not a general way to combine films and television episodes.
Apply ordering after the membership makes sense
The GUI also offers ordering, a result limit and grouping. A short limit can conceal a matching item merely because it falls later in the chosen order. Start without an unnecessarily small limit, inspect the expected sample, then choose the final sort and display size. Save the playlist with a descriptive name and reopen its editor if the membership differs. Changing a display rule does not require renaming the underlying media files.
Questions, answered
Why did a tagged drama appear in a comedy playlist?
If the playlist matches one or more rules, the tag condition alone may admit it. Check the rule combination and exact fields.