You might have created a too general rule which matched several stations. If you create a rule named 'e', all stations with containing that letter will be affected.
I have updated the mod now so that when a rule is deleted all stations will be re-checked.
Note that when a rule is loaded and the name is changed then saved, both rules will exist in the list. It is up to the user to delete the first rule.
Hope this solves the issue, if not please provide even more detailed information. Thanks DDR