There are lots of reasons that could cause this, although I can rule out the usual cause of page encoding as both are set to UTF-8.
It could be that the modifications that you have done are causing the problem. The fact that the post is pasted from Word bloating it out with non standard code within the HTML doesn't help.
It could also be the way the database has been handled, if you have used the import/export tools of SQL Server Studio Manager it may have corrupted the data and saved it in the woring format in the new database.
It could be the collation of the database is different in the old database to the new.
Like I said there are many things that can cause this and there are some many server, browser, and database settings that come in to play that it makes it very difficult to nail down the exact reason why you are seeing this.