balljointsand sway bar

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i was told yesterday when i went for an oil change that i needed balljoints and swaybar.i have56881 miles now.i found a bill from lincoln mercury dated march30,07with 52426 miles.replace both front sway bar links,jointasy-ball,replace left front lower ball jointalso right front lower balljoint.i only went 4455 miles since the work was done.is this possible that the work has to be done again.help