1.Before the transfer, only the source console was A9LH'd, obviously. Now, both consoles are running A9LH.
2.Not that I know of, no.
Wasn't sure if you were transferring because you were testing, or really due to DSiware downgrading.
In any case, thanks!
Would like to hear from 2 3DS thread on whether it was the same for them, whereas the values were simply swapped.