When I share a post on FaceBook, the URL used for my blog ends with "blogspot.in" instead of "blogspot.com".Some people in Europe observe a variation.
When I share a post on FaceBook, the URL used for my blog ends with "blogspot.nl" instead of "blogspot.com".
We've been observing, for many months, that FaceBook and other Internet services should start using the canonical tag, and aggregate BlogSpot URLs, that are subject to country code aliasing. With this done properly, all BlogSpot URLs would be listed as "blogspot.com" - and all Likes, and similar references to a given Blogger blog, would be later counted under the proper "blogspot.com" URL - regardless where a given blog reader gets Internet access.
Apparently, FaceBook is now aggregating BlogSpot URLs - but they are not using the canonical tag in the blog header. For some reason, FaceBook now uses "blogspot.in" - or maybe "blogspot.nl" - as the canonical URL for Blogger blogs.
When Blogger first started using country code aliasing, only Google services such as Google Search would reliably aggregate all country code redirected aliases, to "blogspot.com".
Many non Google services did not use canonical aggregation, immediately. Like every other newly developed Internet feature, it takes time for every web service to update their code.
With only Google using canonical aggregation, every Blogger URL subject to country code alias redirection would be shared using the country code alias, as seen by the person doing the sharing. People in France might share a Blogger URL as "blogspot.fr", people in India as "blogspot.in", and so on.
People in the USA, of course, would share a Blogger URL as "blogspot.com". The USA, and various other countries, is not subject to country code alias redirection.
FaceBook is now aggregating BlogSpot URLs - but they are not using the canonical tag, in the blog header. For some reason, they are aggregating to "blogspot.in" or "blogspot.nl", for some or all BlogSpot URLs, shared to their service.
Right now, if you share a BlogSpot URL to FaceBook, the URL will be modified, to "blogspot.in" or "blogspot.nl". Every Like, and similar activity against that URL, will then be counted under the "blogspot.in" or "blogspot.nl" alias. This is probably slightly better than having every different URL shared by country code alias - but only slightly better.
Blogger blogs published to custom domains are not subject to URL modification, because custom domain URLs are not subject to country code alias redirection.
When FaceBook corrects their code mistake, any newly shared Blogger URLs will be properly modified according to the canonical tag in the blog header, "blogspot.com" (or any custom domain URL). Quite likely however, any previously shared URLs will remain incorrectly aggregated to "blogspot.in" or "blogspot.nl" - and any new Likes will continue to be posted to those addresses.
Some Blogger blogs will continue to appear to have at 3 URLs - "blogspot.com", "blogspot.in", "blogspot.nl", and any others under which FaceBook was sharing, originally.
If any of this offends you, you may need to report this to FaceBook Support. Please, resist the temptation to install malicious code on your blog, that will later leave you asking for advice on having the blog unlocked, cleaned and reviewed.