I'm sure I'm just missing something simple, but after upgrading to 4.5.3.1 when I ingested the cards from my two cameras (which I have checked the clocks on and they are correct) today the files in the contact sheet appeared in capture time order (as I have selected) but in two groups. The first group were from one camera with file names starting with _MG_XXXX, so all of the files from that camera showed first, then the files from the second camera (with files names beginning with _O6JXXXX) were shown--again in chronological order. So why are all of the files not showing in capture time collectively? This has not been an issue before the upgrade.