So far as I know this is how the Aligned checkbox is intended to work. I use PSE9 and the help file states that:
"Alligned - Moves the sampled area with the cursor as you begin to paint, regardless of how many times you stop and resume painting. Selecting this option is useful when you want to eliminate unwanted areas, such as a telephone line across the skyline or a rip in a scanned photo. If Aligned is deselected, the Clone Stamp tool applies the sampled area from the initial sampling point each time you stop and resume painting. Deselecting this option is useful for applying multiple copies of the same part of an image to different areas within the same image or to another image."
Sadly, this is probably not helping your actual query, but it does explain the Aligned function. strong text