I may be missing the point here but in your first paragraph you state "disconnect from the Internet before going to bed".
In your third para you then say "the time to install them is set for Every Day at 03:00".
I assume that 03:00 is 3a.m. in the morning when, presumably, you were in bed and your PC was disconnected from the net.
So, to my mind, whilst your PC may be set to INSTALL at 03:00 it first has to DOWNLOAD - which it may have attempted to do at 03:00.
But as you were disconnected it wouldn't have been able to download.