copy and paste data month to month

I update vehicle mileage on a monthly basis and need a macro to populate a yearly page by month

mileage sheet has odometer in column K and dates in column O, the date changes everytime I update the mileage

I need to populate the yearly sheet according to the corresponding month, so if I update in Feb it should place odom reading in February column on yearly page, when I update in March put same in March column of yearly.
Any help is appreciated
Thanks

The first two work ok, the last two do not. the last two buttons are supposed to take the mileage from the mark or unmarked page and apply it to the corresponding month in the avg pages. What happens when you hit the buttons now is that it puts the same mileage in every months column. so at the end of twelve months they are all the same when the should be different and then total at the end
Thanks

OK I thought I did that, but I'll try again

1) I enter the recent mileage for sheets A010 thru BVHQ, lets say it January.

2) If any vehicles are out for repair, column "N" under status I would select, MVA or Body Shop.

3) I then hit the Populate Repair sheet macro and it populates the repair page with only the vehicles that fit that criteria, I've managed to place a macro on the sheet itself that removes duplicates and sorts the rows in ascending order, because everytime you hit the repair button it will comtinue to populate the sheet with the same items continueing to add the same ones over again.

4) once all the mileages are entered per page I hit the "populate mark / umarked sheets macro" . This populates the marked and unmarked pages accordingly. It also carries over the date that the mileage when updated. That button works.

5) Here is the problem. The "calculate marked mileage macro" and "populate unmarked mileage macro" should take the mileage from the unmarked or marked pages and populate the corresponding "marked avg" and "unmarked avg" sheets. It should place the mileage in the column of the month that matches the date when the mileage was inputed. This date is in column "O" of the "marked and unmarked" pages.

Then next months' (Februarys'), mileage should be put in the FEBRUARY column of marked avg and umarked avg sheets. the problem is that everytime you hit macro buttons 3 and 4, it add the current mileage to the next column as well as the prior, by the end of twelve months they all show the same mileage rather than what they were each one of those months that they were inputed.

I hope that helps, I'm about to give up on it.

Thanks

Q) The Marked and Unmarked sheets would have data for the whole year right?
...It's seems like thats what it's doing but seems rather overwhelming to have to continually add to that page month after month. At the end of the year the Marked and unmarked page would be huge.don't know if we can change it sone how? but if it has to be that way so be it.

Q) So once you run the macro (that i will help you create) to populate the averages, is there a chance that the January data will be changed?
I wanted to populate the avg sheets with the mileage I had inputed at the beginning of every month. so If the marked and unmarked pages continually compile the mileages for january and feb and march and so on.. then the dates sould be there for the macro to polulate the correct months on the avg sheets.

Q) Also, when you run the macro, should data be populated from January onwards in the average sheet or only for the current month?
January and onwards, each month should be going up, and at the totals column have the yearly total which would probably be dec minus jan, and a final column producing a monthly avg of 12 months. Actually it would only be 11 for now since I dont have Dec 2011 numbers for a starting reference. But going toward next year I can use this Dec 2013 as a start for 2014 . that way I would have a 12 months next year.
dec 2013 jan 14 feb 14 and so on.