[Little Miss Trouble]

I'm a little confused here about my doodle and from what I read here..

It doesn't matter where I buy my Doodle really correct?

My Doodle, "Tattletale" was from Donalds Dock I believe and stats were "Standard"

She knows all but one trick that I work with her alot, but no matter what she won't get better at doing the trick?

Thats where I am confused... She will never get better or do the trick more often as a "Standard"?