Hi, it sounds like the position or orientation of your Leap Motion Controller needs to be adjusted so that the hands are seen well and from a position expected by the tracking model. The calibration of the device does not affect the performance of the tracking and if the calibration was an issue the tracking would not function at all.
Please can you send me an email to support@ultraleap.com with a screen shot or screen recording or the visualiuser and I will be happy to help you with this.