Hi Ivan,
Thanks for reaching out! I’ll try to help you here.
A Barry indicated in the thread you mention, we are doing this to avoid duplicate results. If you are not sure about this I would recommend leaving as it is.
If you think you need to index that page then the way to go would be to add the snippet Barry indicated: http://pastebin.com/YtnFtRZa. And then if you don’t want the next/prev months links to get followed, what Barry suggests is to create a template override of the month view template (def check the themer’s guide for more info on this) in order to add a rel="nofollow" attribute to the prev/next links. Does this makes sense to you? Can you give a try?
Please let me know about it,
Best,
Nico