(This item pertains to the check boxes on the General tab of the Setup Options dialog box. You can open it through the F5 key or through the Edit | Preferences | Setup menu option.)
The Patch Scans Maintain Last Increment check box forces each new line of the patch scan to use the last increment from the previous line. If you deselect this check box, the scan will revert to the minimum scan increment when taking the first hit on each line.