Here is the cliff notes version:
The National Grand Lodge (NGL) was meant to be like a COGM to stop clandestine freemasons and spread "negro" freemasonry. Once they started to try to exercise authority over GLs, those GLs started separating themselves (becoming independent like they are today) By the time the convention of 1878 came in Delaware, hardly anybody showed up. There wasn't enough representation to even open the session (quorum) Convention after that, same thing. GL's had pulled away and became independent, thus returning sovereignty to the State GL and not having a GM over state GMs like the NGL is set up. The NGL even started putting replacement GLs in some of the states where the existing regular PHGLs are today! The structure of the NGL/PHO is irregular. The fact that they continued to operate after dying is clandestine. Also the fact the National Grand Master (NGM) put out Standard Operating Procedures (SOPs) that include goals to "Establish recognition with Modern Free Masons, Scottish Rite Masons and International Masons." ,which are known clandestine organizations, makes it even less likely that the NGL/PHO will ever be considered a regular organization or recognized by the rest of the masonic community.