[funstuff]

I knew this would be rough, but I'd hope that stuff that made it into the cart would either get all the way through checkout OR the errors wouldn't trip more lost items.

In addition to losing items, recalculating shipping, losing more items, (repeat), I had it tell me my customer ID was not valid once; by the next repeat, at which point I had lost most items, I was good to go again. I also had "randomly" assigned quantities, which appeared to be based somewhat on my original selection, but reshuffled with the lost items.