In any large spreadsheet, holding an arrow key down to scroll through the sheet is not sync'ed to the active cell when there is data in the cells being scrolled through... Scrolling through an empty sheet, the display keeps up with the arrow keystrokes and stops scrolling when the arrow key is released; but scrolling through cells containing data, the arrow key is released when the desired data is reached; but the scrolling does not stop because there are a lot of arrow keystrokes buffered and still being processed. This results in a overshoot of the desired area. Entered as Enhancement; but feel free to treat it as a bug... :)
155455 has more has a better description and steps to replicate, so gonna mark this as a duplicate *** This bug has been marked as a duplicate of bug 155455 ***