I had tried to create my own near space setting years ago, using info given to me by the director of the local planetarium. Mapping 3D onto 2D was quite a challenge. This was before the Solomani Rim supplement came out, BTW. By my scheme, a few star systems wound up in the same hexes, Sirius and Procyon come to mind. I kept track of the multiples, and kept the brightest, most colony worthy system. Where I had two famous systems, as above, I moved one to the closest adjacent hex. I toyed with the idea of stacking star systems vertically, but eventually decided against it. If I were to start over, I'd keep my stacked vertically scheme, and WISE would be in the same hex as Wolf 359, only "below" the plane of the map.
A lot of the stars near us are small and class M. Most of them don't show up in the canon map, anyway. I'll try a few in-game rationalizations. Perhaps they are too small and resource poor to bother with. Perhaps the OTU is an alternate universe similar to, but not one-to-one congruent, with our own. Or maybe the official map only shows the major systems, the way a road map only shows major towns. Plenty of room to add your own!