I threw this is in the reddit thread, but here's my go at some wild conjecture:
Albert King has 10 letter in his name
He was born in April, which is the 4th month.
He died on the 21st day of December.
Not sure how that works for Rap & Hip Hop, but if the artist is still alive it explains why there's no third number for that one.
The mono version of Born Under a Bad Sign looks to only have 2 official releases, both going for a good chunk of change.
And it looks like the last press of Jammed Together by Albert King was in 1990. So, long enough ago for VMP to be interested in doing one. Though, I don't know how any of them sound, so not sure if there already is a definitive repress of it.