that is just another "test" version that moto released in trying to see what would work best for the final version. Apparently, after test results, motorola decided that 5.7.893 is more optimal and is gong to release that as the official one. This is the best explanation i can provide, but it seems to be correct, as new uesrs buying phones are now finding their phone on 5.7.893 out of the box AND moto told me that my phone had the latest update when i called them. There's just too many versions floating around, and too mny people trying too many different things, with varying "results", so its leading to complete chaos and confusion. I blame motoroal myself, cause they can't just be straightforward and tell us outright what the version is or if there will be problems for people that applied a certain update manually.
All that said, all this back and forth and speculation is just making people crazy and i think its leading to much wasted time. Anyways, I am bowing out of this thread, good luck all. I believe the info I have provided is correct but feel free to keep searching for the truth, lol, whatever that may be.