The divorce decree was obviously an error. Stanley Ann may not have known about the bigamy or may have been advised by counsel not to use it, there being other more convenient and sufficient grounds for getting out of the marriage and moving on.
Also, as as been shown by FOIA document releases, the State Department knew of his prior marriage in Kenya and was on the lookout, lest he use a sham US marriage to convert his transient, non-immigrant student status into citizenship. Of course, that was never his intent. He aspired to be a big shot back in Kenya and "shape the destiny of Africa". But ultimately, it seems it was his womanizing ways that turned Harvard against him, got his student visa revoked, and sent him back to Kenya without the Harvard PhD he had hoped to obtain (not that he didn't claim to have it, once he got back home).
I admire your tenacity, but get real. Errors, bad legal advice, what the State Department suspected, etc. add up to zip in this matter and have no force in law. The marriage is documented via the divorce decree, so Baby Hussein was not born “out of wedlock” legally (even if Barack, Sr. was cuckolded and not the biological father). No one has standing to file any sort of action to undo the marriage now. This is a red, or at least dead, herring, from darn near the bottom of the barrel.