Switching to LrC from Lr & Classic won't stop syncing.

Hi, 

So I'm going down the path of switching over to Classic from CC, and my god It's brain busting. 

Originally I thought I would just sync everything over to classic - I cleaned out my CC app, down to 10,000 photos, and started the syncing process. 

But then I thought well what's the point, if everthing is going to be stored on harddrive now with lightroom classic, why do I need to sync it at all. So I decided (shortly after already starting the syncing process) that I only wanted two albums synced from CC, because they are my two current client galleries left to edit (the rest are completed and stored and sent off to clients, so I don't need them on Classic really, they can stay on CC). So I went through the process of unchecking all the albums that, except the two I wanted, but it keeps telling me there's 6000 photos to sync (when there's max only max 200). And it keeps randomly rechecking albums I had unchecked. It's so frustrating. For now I've just stopped the syncing altogether until I can find an answer that works. I'm considering just completing those 2 galleries on CC and from this point on importing all future galleries to my LR catalog harddrive and not syncing anything. 

Any suggestions?? 

Where are the synced items kept anyway? In a separate "cloud" based catalog? As in if I create new catalogs afterwards for separate clients, I'm not going to always be seeing the photos that synced before I stopped it in the nacigation panel am I?

Should I just remove all synced photos from Lightroom?

Thanks.

Sarah