PSA: your Leuchtturm page numbers will skip if you start an index on page one, learned this from the BuJo FAQ
Just counted and my November spread is off by 4 pages because the pre-numbered ones start after the first few blanks. Did you all leave those first pages empty or just live with the mismatch?
Wait, that's not quite right! The BuJo FAQ doesn't say your numbers will skip, it says don't put your index on page one because the notebook already has page numbers printed on certain pages. The skipping thing happens because of how Leuchtturm sets up those first few pages, not because of the index itself. I just left my first few pages blank for a key and future planning, and my numbering has been fine ever since. Honestly the mismatch you're seeing is normal for the first few pages in any Leuchtturm, index or not.