Capture and creation times should generally be the same but this should not influence what you are seeing. You haven't answered my earlier question yet though: are the camera times exactly the same (and I mean down to the second)
Also if you're shooting multiple frames in a row, multiple images will have the same capture time in seconds. Depending on the camera model, subseconds are recorded as well. To be able to sort including subseconds, create a custom sort and sort on {datesort}{timesortlong} this should do the trick (I use his feature all the time)
Hope his helps,
Hayo