You may have set such a feature by accident in the Wordpress settings.

Are you logged on to any administration account to manage your website?

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

• Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

• Tools > Options > Privacy > Cookies: "Show Cookies"

Thanks for your answer. I followed your instruction and clear the cache. Also, I updated Mozila. Just for curiosity I did the same using Opera as browser. The point is that it continue the same with Mozila and other browsers but w/ Internet Explorer is ok!. http://1040examprep.com/package-series/#.Ty0-yeTNkSE

Also, I went over each setting on the dashboard of Wordpress and could find anything that call my attention.

Can you tell me what means the symbol #. What it does?

Thanks

The hash symbol is used to specify an anchor on the page to jump to a specific position, but may have been added in this case to get an unique URL to make sure that a new page is requested from the server and not a previous version from a local cache.

You can also check the settings in the editor and upload software.