Mobile issues

Mobile issues

Good night,

New to Books and so far I seem to be likening it. I do have an or subjection. I run my business 90% from my phone. I created two invoice receipts (one the invoice for the customer and the on  the other to let the customer know the merchandize is in and can be picked up. Everything seems to be working as expected until is time to print. 

- Is there a way to be able to change the invoice templet on the fly from the iPhone app.
- two sometime customers will over pay by a few dollars, I would like to be able to accept the payment, but its not letting me (gives an error) on the app, only online.

Thanks for any subjections.