You wrote here that Softserial doen'nt work with servo lib. It is always true?
Try
https://www.google.com/search?hl=en&as_q="SoftwareSerial"+"servo"+"library"+arduino&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=&gws_rd=ssl
and see for yourself 
I tried your sketch, removing Wire and snootor references; serial monitor readings are 100% stable
Please upload Pan & Tilt demo sketch at reply #242
// Arduino pin #0 to TX BlueTooth module
// BT TX to be disconnected from D0 during sketch upload
// pinServo_X=9 pinServo_Y=10
Do not use SoftwareSerial for the moment, let me know how it works
Which Arduino board are you using ??