Probably not often this happen, but better safe than sorry.
It was quite a sight watching the wallet, both bots complaining in order :)

Just add in a code like this:

•   if(retries < 2)
   setTimeout(function() { sendVote(bid, retries + 1, callback); }, 10000);
   else {
   utils.log('============= Vote transaction failed three times for: @' + bid.author + '/' + bid.permlink + '       Bid Amount: ' + bid.amount + ' ' + bid.currency + ' ===============');
   logFailedBid(bid, err);
   }
  

I did however raise the refund limit to 0.002 so the memo advertizers don't get a refund.