Two Of my top TCIs are suddenly not even in my Top 2000 TCIs !?

[oplars]

I was surprised to see in the personal update that came yesterday update to see that my #2 TCI (arirang) and #5 TCI (kode) were suddenly reduced to my lower than 2000th TCI. I wondered what might have made that change. My former #2 has not rated movies since 2015, so it must be because of me, I thought. I checked, but none of my latest ratings have given rise to any greater difference between our ratings. I wonder if it's a bug then? Or because the upgrading of the site has begun. I hope so