@John *********
That's what I'm thinking. I went through the application and the wording is "Document indicating current location (e.g. valid visa...)
So I guess I cancel the original application, fill out everything except for question #, Go to Savanakhet Sunday and upload a photo of my Lao visa for question 3 when I get there and hope it gets accepted and I'm able to print off the payment slip before I go there on Monday morning.
It does say on page 1 that you have to be in lao and can't fill it out in Thailand, though I've done it before.