You don't have all of 1-2 here. There are two parts with Warp Zones (and the missing part with a Warp Zone has a bonus area). You're also missing the area with the flag.
See VG Maps (they don't like hotlinkers) to help compare: http://www.vgmaps.com/Atlas/NES/index.ht...arioBros2J
See VG Maps (they don't like hotlinkers) to help compare: http://www.vgmaps.com/Atlas/NES/index.ht...arioBros2J