Just tried both ways. Did 1 file ftp - took a long time on a very fast connection and ended with error messages.
Tried 5 files http, took a long time and ended with page cannot be displayed.
Now there are 7 in the waiting to be submitted. 3 copies of 1, 2 of which don't display, 2 copies of another.
End result if I delete the bad ones and the dupes, I end up with the 5 I wanted.
As I begin trying to get rid of dupes, other dupes keep popping in there.
After hitting the submit button, it came back with more dupes, missing keywords, etc. Removed those, submitted and seemed to go.
Don't know if they will turn up in the waiting to be reviewed bin, but clearly there are still problems.