Order of order of fulfillment

Assuming orders will be fulfilled in the order they were placed. If I upgrade from a basic to a pro will I loose my place in line, ie, if I ordered a basic on day 2 but I upgraded to a pro on day 20, will my order be lumped in with the day 2 or day 20s?

Please make the pro available without a filter so I can upgrade my order.

You won’t lose your place in line.