I'm here to sort things out for you, @cttajlan.
If there are too many sales transactions created, you can delete them. Let me show you how:
For your second concern, if you mean to create an invoice to diminish the inventory, you can create an inventory item and apply the invoice after.
If you mean other things, you can add some more details so I can provide other steps to fix this.
I've also added this article than can guide you on how to track inventory: Set up and track inventory in QuickBooks Online.
I'll be around if you need anything else. Have a great day.