Are your replays for these packs quite old? If so, they likely don't have your name in them - a recent update (NL 12.6.0 IIRC, but might have been 12.7.0) added a feature where it will only update the passed status / the save records / etc when checking
your own replays (other peoples' replays won't affect it). However, on older replays that have no data about who's replay they are, it can't match these to you, so it assumes "no, they're someone else's".
You can run your replays through the Replay Refresher tool to add your name to them:
https://www.lemmingsforums.net/index.php?topic=4378.0Make sure to use the same name you specified in NeoLemmix's configuration.
This will also ensure your replays are 100% up-to-date format-wise.
If this doesn't solve your issue, let me know.