bug in archivements of exploration

Hello, first of all apologies, not be if this is the correct way to submit my question and apologies if it is difficult to understand me, do as possible with a translator.

I have a problem with the achievements of exploration, just don't mark me as "explored" the points that I have already visited, I have a Tauren and logically I started to explore Mulgore, but presented me the problem, then tried with another character, an undead, and also presented the same problem in Tirisfal, the guide's achievements not recognized as "explored" the points he had visited, this problem has a solution? Thanks in advance for your reply

In the vanilla zones exploration is a bit harder than newer expansions. Sometimes you might miss a tower, but your map will look complete. Check the spots you need to visit for every zone and google them. if needed. I got "World Explorer" few days ago, so everything is working properly i guess.

Not really, I started exploring today on my 90 lvl, couldnt get credit for exploring, Vale of Eternal Blossoms, Kun Lai Summit and Durotar, the things I explore dont turn green in achievemnts menu, they stay grey even tho whole zone is explored, so I just gave up on exploring ...

Me 2 , have this problem, i'm ally gnome, when explore archiv , dont sign new place

Same here, explored all of westfall yet it says that there are two spots that i didnt when, on the map, its clear that i did. However i did get the achv of exlporing pandaria some time ago and now it seems that you cant get it anymore, i think this achv became bugged due to all the patches and old raid releases etc.. Needs to be fixed by warmane staff.

Wowhead the spots on the achieve that are still grey. The map will look like its explored but there will be a sliver that isn't uncovered, easy to miss.

No, this is not a case of people missing an area that looks explored. This seems to be an achievement progress counter bug, where you visit the area, get it marked as explored on your map but the achievement doesn't track your progress. This broke for me sometime during the Halloween event, I made a forum topic to see if it was just bugged for me or everyone else but alas no replies were made. I was just getting around to exploring Northrend at the time.
Here, see the two screenshots below as an example in case I haven't explained this clearly enough:
http://i.imgur.com/ASHIRlu.jpg
http://i.imgur.com/xiaaPfz.jpg

Even I get the same problem. Faced this when I was exploring Durotar. It was fine before, I got the achievement for Deepholm and some other regions but now it's completely bugged, probably happened after the guild achievements were fixed which also led to 'Jack of All Trades' and 8th Guild tab achievement bugged.

Sometimes even if you don't get progress counted when you explore part of the map , but when you explore whole map you will get achievement.

Now in your case @sammy3 you missed one point i see from here is on the left side of icecrown there is an island you will need to explore.