Same problem here with the Jr. A few weeks ago in ATL arriving from MBJ, when I went to the GE kiosk and it kept saying I wasn't enrolled (I most definitely am). I ended up going to a CBP Officer who told me that DL had my name incorrect in relation to my passport i.e XXXXJR instead of XXXX JR. I called DL and they said they fixed it but voila it's back to what it was. CBP told me it must be an exact match. I'll take any advice as well.