Dear @aftabkhan10, the Bot Tracker Tool is to be used only for orientation. Is not an official steemit tool. You placed your bid in the last seconds according to the Bot Tracker Tool to snipe out a better vote, but you did not check the block count in the steem data base. The Bot Tracker Tool was at the time 4 blocks late so your bid was on the new fresh round not on the one you have been trying to get. Also Bot Tracker Tool was build with purpose to not to overbid on a full round, not to snipe good rounds, please have that in mind.
As in the previous reply, @boomerang is a bid bot with the purpose to be used as a promotional tool not as a profit generator.
Thank you for your understanding,
@boomerang