Originally Posted by ULTiMATE ...but they always expect me to keep working on their site, updates, and all that stuff ....... then he said to me "I'll also be needing you to alter graphics on the site for me." .... ... Every client seems to presume that I'm there with them for the long haul. Am I missing something here?

What's the problem here? Do you not want to design for clients? Don't you want the extra work? Aren't you into designing for clients for the long haul?

Everything additional to the original contract is additional money and work for you, how simple is that to understand?

Make sure your contract covered everything, you should produce a new agreed addition to the appendices in your contract for each new element desired by the client. Get them signed off one by one, and each element is created under the original contract conditions except completion dates of course.