[[месяц]]

Well, here you were really quick. (Reconstruction:Proto-Slavic/měsęcь). I don't know how, regarding your taals. Of course, I guessed what was the matter, regarding my taals, but while I was typing this in the discussion, it had already been done. So I dropped it.

But, here is more complex case in the title, would you please, or do it, or report to proper place. спасибо.

I'm not sure what the problem is exactly. Can you elaborate?

Oké, dit is mijn fout. Ik heb het niet meteen gezegd. Look at the discussion please. Talk:месяц.

Not so. There is no 3, it's just obvious month, i.e. 1 and no doubt.