Updating Quickbooks Invoice with Shipstation Tracking number

As you know, QB online don’t support using customer’s shipping accounts. So, I want to use shipstation to use customer’s shipping accounts and create shipping label with tracking number. By this purpose, I want to integrate between QB online and shipstation, via zapier. 

So, I created 2 zaps like below stream;

1. 1st Zap
   Send invoice from QB online to shipstation
   Trigger: create an invoice at QB Online
   Action: Find Invoice in QBO - Order Number
   Action: Send this Invoice in QBO to Shipstation (it will be delivered in awaiting payment)
2. 2nd Zap
   Send updated invoice from Shipstation to QB Online to update existing QB Online invoice with tracking info
   Trigger: Make the Shipped invoice (order#) atshipstation
   Action: Find an invoice with same order# (invoice) at QB Online
   Action: Send this updated invoice with tracking # in Shipstation to QB Online (it should update existing QB Online Invoice)

Is this the right way to make updates in QBO ? Because, when I run 1st zap, it is working. But, the 2nd zap is not working. Would you this workflow is correct or need to adjust it ?

Thanks!