I can't get over it either. I have a muffin top and I've eyed the Jag jeans, but I won't wear them. They just trigger maternity jean in my mind too. I think there are other options. You should never feel demeaned or demoralized by your jeans. They should always make you feel happy.
By the way, I say this, but I am a HUGE fan of maternity leggings from Old Navy. They are the only leggings out there with a broad, flat, no bulk, no pinch waistband. They are perfect as a layering piece. I guess that I can justify buying them because they don't really look any different than any other legging. They only look different in a way that isn't really an accommodation of my belly so much as they are a practical solution to a systemic problem with legging design. So I won't wear jeans because they remind me of maternity pants, but I will wear maternity leggings! Oh what a goofy mixed bag we humans are!
ETA: Totally want to acknowledge too that this isn't anything against Jag jeans on others! It's a weird thing. They look great on folks and I see fabulously well dressed gals wearing them. Just somehow they trigger something in me. Maybe because I wore maternity jeans pretty recently! LOL! I won't wear jeggings either for the same reason, even though they look fan-dibby-dozy-tastic on my friends. I do think it has to do with the fact that you pull them on.