Can't adjust recording level (greyed out) using usb mic interface

I'm trying to record a track using a USB 2 mic interface. It worked yesterday... I've got everything plugged in, I have the USB interface selected as the input source under garageband audio/midi preferences, plugging into the built in direct monitor on the USB device I'm getting audio from both mics. I've tried selecting both the mic's individually as Mono 1 and Mono 2 as well as the Stereo option under input source. I have the record button clicked on the track itself, but when I record there is no audio, the audio from the mic's isn't making it through somehow. The "Recording Level" slider is all the way down, though it as well as the "Automatic Level Control" are greyed out and un-clickable. I'm assuming that is the problem but I can't find a single way to have the recording level become adjustable and stop it's infuriating ineffectual greyishness.

Any help anyone could be would be much appreciated, I'm new to this and have almost no ida what I'm doing. Thank you.

USB device is a Focusrite Scarlet 2i2,

Mics are Shure SM57's, though I can't imagine that making a difference.