issue when using xdjxz + cdj2knxs2s

this is very annoying.

i have xdj-xz + two cdj2knxs2s

when i plug my usb into xdj-xz's usb 1 slot,

it appears as "SD" not "USB" on both cdj2knxs2 link page.

i suppose there might have been some kinda glitch when i had my SD in my one of cdjs' and my usb in the xdj-xz usb slot1 at the same time.

since then, whenever i plug in any USB into xdj-xz usb slot 1, it appears as "SD" on my both CDJs' link page..

usb slot 2 is fine, it appears correctly as "USB" problem is only when it is plugged into usb slot 1.

please help