Strange Poll options and display...
 

Can anyone tell me why one of my polls has a null option with 43% of the vote - this is a long standing poll and one that should only have 4 options - maybe an admin tried to do something to this poll but I see that there is a blank option with lots of votes and when I go to edit the poll there are two "Additional Options" that I don't recognise.
Attachment 42861

Attachment 42860

Attachment 42862
Maybe I am missing something but I can't see how this could have happened or how I can fix it - the poll is old and quite important.

TIA
Will
Attached Images

• http://vb.ma7room.com/png.gif Screenshot-1..png‎ (71.4 KB)
• http://vb.ma7room.com/jpg.gif Screenshot..jpg‎ (45.0 KB)
• http://vb.ma7room.com/jpg.gif Screenshot-2..jpg‎ (70.6 KB)