Yeah buddy you aren't alone.
https://forums.macrumors.com/threads/1791147/
We've been discussing this. It's a real ios 8 bug. Even the shiny new iPhone 6 has it. Please fix Apple! Mine hangs on various percentages and its not a calibration issue or a battery issue because my iPhone 5 battery is new and I've done a few down to zero full discharges and fill ups.
EDIT: Just upgraded to iOS 8.1 beta and while charging it hung at 59% then jumped up to 61%! I hope this is fixed someday!!