Thrustmaster T300 RS GT | Calibration and Centering

[Takso]

I've recently manually calibrated my t300.The wheel is now more alligned to its center when on 50%(control panel).The thing is that now, the wheel after performing its auto calibration process stops at another percentage.(f.e: 50.1-50.2 etc..)Is this a common occurance or should i be worried?It used to do that before as well.
P.S:Is there any way i can factory reset it?