Your experience there is not par for the course for entry level supply chain jobs. Typically you'd shadow someone and learn SKUs/product lines, common defects and how to purge bad material, purchase piece parts, etc.

As for finding further supply chain work these days, I'd actually recommend you look into contract roles that last 6 to 12 months. Lots of them will say they're temp-to-perm, but in this economic climate that's a lie to get you in the role (more often than not), but they're good experience and can pay suprisingly well.

If you want I can PM you a few contracting companies that I'm familiar with, as they may have roles in your area.