Subtitles on Viki can be written and re-written many times. The little edits that are made help get the nuance of the subtitles just right!
You can see all the edits that have been made to any given subtitle through the subtitle history. To access the subtitle history, select the segment you'd like to see the history for.
The number on the button will let you know how many times the subtitle has been edited. If you click on the button, you'll see each edit.
Once you open the subtitle history, you'll also be able to select a subtitle. The selected subtitle will display to all viewers on Viki.