My cloning stamp is suddenly doing things differently, but I didn't knowingly make any changes, so I'd like to reset the program to its original settings but I don't know how. Thanks for any help.
Quit the editor, then restart it while holding down ctrl+alt+shift (command+option+shift on a mac). Keep the keys down till you see a window asking if you want to delete the settings file. You do.
Resetting only clone stamp tool option can also fix the issue. Select Clone Stamp Tool. Click the flyout at the top right corner of the option bar of clone stamp tool and choose "Reset Tool".