Dr Clarke Goof?
S2 E1
SPOILER ALERT
Correct me if I am wrong...
When Dr Manning and Dr Clarke are together at home they show a photo of Dr Manning's deceased husband and Clarke overseas, Dr Manning's husband was a Ranger in the Army, Clarke was a Marine. They are deployed together and both wearing Marine uniforms not the uniform of an Army Ranger and it is highly unlikely they would've served together while deployed.