I would suggest to leave things are they are right now...it seams they are migrating all previous applications and had posted a new job opening (different number from before) making the old one unavailable.
I remember seen on their "old" website a message stating that all current applications with their current info will be migrated to the new website, so the best thing to do right now is to waited out and let them do their work ... the "Under Review" is probably 'cus new requirements are being considered
Rj