Multiple upstream jobs => extra downstream builds

[russ...@gmail.com]

I've been looking at the timing of this issue and I now have more/better information.

Here's what happens:

Downstream job, DS, has two upstream jobs, US1 and US2.

03:35PM - US1 completed
04:48PM - US2 completed
04:48PM - DS begin
06:10PM - DS completed
06:11PM - DS begin (again)

How to I prevent these extra downstream builds?

Thanks,
Russ Hll