Hello (and thanks for buying!),
Sadly Unity doesn't allow to specify which DOTweenAnimation you're dragging on a Component's variable, so when you drag those 2 animations there, it will actually assign them as the same one.
That said, in your case there's a much better way to do what you mean to. Create only one DOMove animation, which will move the panel on-screen. Deselect autoPlay (so you can control it via your other gameObject) and autoKill (so it can be re-used after it's complete). Then when you want to show the panel, call DOPlayForward(), and when you want to hide it DOPlayBackwards().
Hope this was what you were looking for
Cheers,
Daniele