I have noticed there is an issue with selecting an AP that its name has accented letters. e.g. like ΄ or ¨ that some languages have (Scandinavian, French, Greek etc.) Can it be this case? If you look in the small info box (that shows the Name, MAC, Channel, etc.) if the name and MAC is from the one you want to select. If it is shown there, then you can be sure it will be those parameters that will be used.