And how did you measure the distances? Bicycle odometers, unless carefully calibrated, are notorious for being inaccurate. I agree with Zeke that something doesn’t add up here, even with that explanation.
In running terms, you can’t become consistent in a month because consistency is about what you do day after day, week after week, month after month. By definition, you need multiple months to establish consistency.
What is this going to accomplish?
At the point where you are now, you will need to work for the finish. Personally, as I have already stated previously, I don’t think you can realistically expect to make it the whole way without walking and waiting until you can’t run to start walking will lead to much more suffering than if you start mixing in walking right away. BTW: Galloway’s suggestion for 4 hour marathoners is to go for a run/walk ratio of 7-8/1. I’m not saying that’s right or wrong but I was thinking 10/1 seems reasonable.
Why can’t the goal be to make it to the finish line in one piece? Given what you are trying to do, this could be a very lofty goal.