If you want to stop your Walmart.com orders from going to Shopify store then follow these steps:
1. Go to “Setting” there you can see “Walmart Orders”.
2. You can set “NO” to “Set ‘No’ if you don’t want to sync order(s) in shopify store“
3. Then click on “Save” button on top of page.
Now your orders will not sync to Shopify store. And you can easily manage your orders directly from Shipstation.