How to fix Post Missed schedule

So for the last two days, two of our posts have missed the scheduled time to post, we have an RSS feed for them so it's important that they go out on time so our readers can view them and get them in the RSS. They are scheduled for 00:15, So my question is two-fold, are there fixes for this that we should investigate? Also, supposing this is just "one of those things" and that it occasionally happens, is there a recommended fix that would check this and repost it at a later time?

Thank you for your help.