When the paper width direction is not aligned neatly
In the [Finishing: Finisher 2] group of [Adjustment Settings for Operators], select 0701: [Paper Alignment for Stapling: Across Feed] and adjust the width of the paper alignment jogger for stapling.
Use [] to increase the width, and [] to decrease the width.
1st and 2nd sheets are misaligned.
In the [Finishing: Finisher 2] group of [Adjustment Settings for Operators], set 0707: [Number of Sheets Align for Stapling] to -1 sheet.