Are those the only downloads you have or do you have others downloading also? XoloX only tried to download so many segments at once. (Max UL speed * 2) If all the slots are full it queues the rest of the jobs to tell you they are not currently downloading, but will later when other files are aborted, completed, paused, or get dropped.

If you are getting that when you are only trying to download those three files and no others, try pausing and resuming them, or closing XoloX and re-opening it.