You are probably having 'www.' issues.
Caution - techie babble follows!
You have to realize that
www.troublefreepool.com and
troublefreepool.com are two separate entities. They look the same, they are used interchangeably, but they are different.
Your login is saved in what is called a 'session', which exists on the server and holds all the information associated with your current login. The identifier of the session is stored in a cookie in your browser - it is called 'troublefreepool_sid' and is a long series of characters like '15994cff54e86a1b6be3ed9cc146a97a'
This cookie belongs to the domain -
troublefreepool.com
There is another one that belongs to
www.troublefreepool.com, and while the name is the same, the identifier characters are different.
All well and good, but here's where your problem comes in... when you log into
www.troublefreepool.com, it processes your login and sends you to
troublefreepool.com (note the lack of 'www.') There, at this other domain, your login has not yet been processed, and you are forced to repeat the process.
Whew! Techie spew over - solution follows...
If you remove the 'www.' from your bookmark, and start at
'troublefreepool.com', your problem should go away.