Sometimes older versions of pages are cached in your browser and can provide challenges when trying to navigate and/or log in. A good practice is to clear your cached files and cookies. Below are some instructions on how to do so in Safari (8.03).
To begin, click on "Safari" then click "Clear History and Website Data".
Next click on the drop down menu next to "Clear".
Next, select "All History". Note, you can select a different option, but by selecting all, it ensures the cache that may be impacting your issue will be cleared. It will also clear all of your history as well. Not just your cache.
Next, click on "Clear History".