Post-close OTC pricing has been screwy for some time. The feed that I-Hub uses seems to be inaccurate at times on both price and volume. That is particularly true of gray market stocks like SHMX where there is no bid/offer.
I don't believe SHMX has traded a single share in almost 2 months. It may never trade another share before the SEC revokes the stock - permanently. There is little interest in buying a soon to be revoked stock.