iCloud for Windows Photos Upload

I have recently moved to apple and purchased icloud storage so I got an export of my photos library from google photos, installed windows 10 icloud sync app, and copied the old photos into icloud photos folder which kicked off the upload of these photos. I had over 20gb of photos so it took a while but slowly all photos were marked as having been uploaded and I was happy.

The day after I searched for a particular photo and couldn’t find it.. at first i thought it wasn’t exported by google but it was there, then I checked the icloud photos folder in windows and I actually found it there and marked as though it had been uploaded.. icloud storage also shows 13gb total storage used on photos when i clearly had over 20gb old photos only (excluding photos I have taken on my iphone even since the switch)

has anyone experienced this? Or maybe know what to try/check next? At this point I dont know which of the photos have actually uploaded or not :/