Batch Jobs Problem

Hi all!

I have a batch job that runs hourly and now I need it to stop. I had scheduled it to end at the start of May 2. However, when I got in this morning, I found out that it still ran today and processed a file early this morning which it shouldn't have. And when I checked the batch job, it seems that everytime the batch job runs, the end date also gets extended another hour. The file is a valid file but my problem is why the batch job still ran when I had scheduled it to stop at the start of today?

Thanks in advance!