PinkElefant,
I did what you mention about the "View" menu. The numbers shows up now aside the tags, but some tags still doens't delivery the results or some tags with 4 or 13 links just delivery 1 result; I mean, I just see 1 note instead 13 or 4 notes related to the tag.
It looks like my Evernote is loading partially the notes related to its tags.