I hate it, but I resolved this by just recreating the package from scratch.
The most annoying this is a just copied and pasted the connection managers and tasks/dataflows from...

It's not quite clear what you are looking for, but I think this is what you want...

-- You can do distinct, just dont do it against the...

Just to be sure, are you both copying into the same application?
And if so, could it be a setting in that application?

Just took a quick trip through...

Bah, nevermind.

Delay Validation set to True is working for the remainder of the packages I am creating.

However...

What made me think DV was not involved was that my first package had...