Yes, I see what you mean. This seems to happen for the last day of the month, maybe because of the large number of sweeps.
There is a way you can see them though, just not all at once. When you go to Expiring Sweeps, September 30, click one category at a time. For example, you can bring up all of the One Entry sweeps, and when you finish them you can click on the next category that you are interested in.
This seems to be a recent change, so you may want to check with the Admin to see if he is aware of it, or has plans to change it, or if it is here to stay.
Good luck with your sweeping!