Reply to Akai LPD8 X 2

Has anyone had any issues with running 2 of these. I just recently got a second one to control different things on decks B & D while the other controls Decks A & C. Now I wanted them to mirror the same exact functions on both just for different decks so I made them each have the same exact Midi Key layout and CC layout. I'm not sure if that is the problem or not. But it all worked great last evening . Then today the newer one stops working. well after plugging things in and out then recommiting the upload it starts again. But the other stops working. But at least now the first is sending a signal to Traktor which the other wasn't doing at all this morning. So Ill remap the keys later to check that but has anyone had anything similar to this and can offer advice.