@awett i can't help you like that
you need to tell me what output you see

But probably your problem is with injection drivers
idk if it is legal to post them here cause you eed to donate lxp to download them (not sure)

or because you start aireplay-ng before airodump-ng
wich will not make wlan0 turn into monitor mode
or simply do:
ifconfig wlan0 down
iwconfig wlan0 mode monitor
ifconfig wlan0 up