Hi
Since yesterday Electrum has just been 'synchronizing' and when I try to withdraw bitcoins I have gotten this message - error:{umessage: u18 bad-txns-inputs-spent.u code:-26). Out of the numerous attempts I've made I've had 4 successful withdrawals adn severals other have been shown as successful on Electrum but when I check the withdrawals they don't show up on blockchain.
http://http://postimg.org/image/yp8o9f0nd/[img] - Image of the error message when I try to withdraw.
I have the seed and password so I can restore on another computer I believe but any help would be greatly appreciated and I can offer a small reward if anyone can help me solve this. Thanks