Any idea why I am getting a 2 bags allowed on the outbound but only one back on the inbound from KLM MMB?
It seems that's a known bug in the KLM MMB feature. Although not the topic that the thread was opened for, it's been mentioned in the last few days over in the thread about the glitch with showing the correct status on the KLM website that the baggage allowances are sometimes displayed differently on the outbound and on the return. I think it's safe to assume that what you're seeing for your booking is incorrect, I wouldn't worry about it. You should have the standard KLM allowance for all flights.
Why I am flying that itinerary is a long story.
No need to explain - I've had to make some unusual last-minute changes to itineraries, too.
Enjoy all the travel ;-)