All of our categories have "Is Anchor" set to Yes so that the left-hand navigation shows up. I recently discovered one category that had "Is Anchor" set to No (so when you clicked on that category you lost the left-hand navigation). I've tried changing that No to a Yes, flushed the cache, confirmed that the value is really Yes, etc but we are still losing the left-hand navigation for that category only. Any ideas on what I might be missing?
With setting up Category Is Anchor to Yes, Also check if its not done:
1. Open attribute and set layered navigation -> yes
2. If it does not work, reindex from system->index management (even though Magento wasn't asking for a reindex).
Let me know if it helped or still issue persist?
I confirmed Catalog -> Layered Navigation is set to Yes. Is Anchor is set to yes (for the one category that isn't working properly) and reindexed all indexes. Still having the same issue.