Also, you can check the order of the vidcaps when you upload them. Once you've uploaded them, before you hit the "submit reply" button, check the order that the caps appear in the "manage attachments" section: that is the order that they'll appear in the post.
If they are out of order, just remove all the caps except the one that is supposed to be first and then re-upload the others in order. That should put them in order, but if not, just re-do the process. It doesn't take much time and is very easy to do.
