Missing Feed Archives

I went to look for some audio on my feed today (8/8/14) which occurred at 9:35AM. If found that the archive of my feed from time to time is missing small chunks of time (up to an hour), and as luck would have it, 9:35am is missing from today ( http://ift.tt/1sFTAnx ).



I don't recall this being an issue in the past. Is something malfunctioning? Is there anything I can do as a feed provider to prevent this from happening?



Thanks.