I have accepted one answer and I had given one up vote to the answer and again tried to give one more upvote then the vote count was decremented to the answer and now I can not upvote the answer like there is one vote already then I upvoted to the answer then vote count to the answer was 2 then I again tried to upvote then vote count was then 1 again and now it cannot be upvoted by me, then what is the problem can not I now able to upvote the answer now onwards and other question is can not I give the two upvotes to one answer?
Error comes like : Vote too old to be changed, unless this answer is edited (click on this box to dismiss)