Laptop Battery Information Software Giving off a weird result

Hello, i just bought a extended 97wh genuine dell battery for my e5420 laptop from ebay. After recieving it i decided to use a software to let me see if its worn any which it said it was 100%, 2 days later i looked at it again and it says it is 6% worn, and i was only gonna get 91wh on a full charge. now i looked and when im at a full charge im getting the designed amount of wh and its claiming my battery is at 106% charged, i understand why its saying 106% is because its holding more then the software thought the battery could hold. but how can i fix this, i tried to recalibrate the battery by killing the battery at full charge and then recharging it completely, but unless i did it wrong it didnt work. ive used 3 different peices of software including checking with cmd but they all say its wrong. i think this would be called a false positive on the wear level?