There are a number of options in how you use an attorney. I tell my clients to think of these options like a box of colored pencils.
Attorney of Record: This is the most common and most traditional option, the one where your attorney handles everything for you. If an unforeseen issue comes up, your attorney of record will address it as part of your representation. (In this option, it's like you buy the whole box of pencils: you might think the light blue one won't get used, and if it doesn't, you don't pay for it. But if you need it, you'll be glad you have it.)