I have tried a few things such as using designs throughout - these screwed up on quite a lot of products. So, I disable this - refresh my site - all of the products (not wanted) are still there.
It appears that there are quite a few issues with Spreadshirt. Slow product placements, unresponsive to setting when they are changed, etc.
I used Spreadshirt a few years back - pretty good. Has it got too big to look after it’s loyal shop owners?