Hi @KelliG, thanks for letting me know!
In regards to the integration, I'm not too sure of this myself. All functions of the integrations are managed by our partners directly. In this case, the BigCommerce team would be the better one to check with.
In regards to the stock levels on Square, stocks are assigned per location so they don't exactly "share". For example, if you have 10 of an item in stock, you'd need to assign 5 each to individual location. You can always update the stock from your Square Dashboard.
You can definitely assign the item to an additional location anytime! There are two ways of doing this.
1. If you want to assign an individual item only, simply click into that item from your Item Library > click into the blue location link. A pop up will appear and you'll be able to make it available at your second location and choose whether this item will be available at all future locations.
2. If you want to assign all the items from one location to another, you can do this by going to Account & Settings > Business > Locations and click into the location you want. When you scroll down, you'l see an option to Match Item Library from Another Location and be able to select the location you'd like to match with.
I hope this will help!
