Did you think to open the serial monitor on the sending side and check what was actually being sent? I did and saw this:
,350/35/<some gibberish>
Hardly the numbers you expect, eh?
Now if we change the sending code to send "decimal" numbers like this:
Serial.print(".");
Serial.print(servoVal1, DEC);
Serial.print(",");
Serial.print(servoVal2, DEC);
Serial.print(",");
Serial.print(servoVal3, DEC);
Serial.print(",");
Serial.print(servoVal4, DEC);
Serial.print(",");
Serial.print(RotationV1, DEC);
Serial.print("/");
Then we get better results:
.255,0,0,255,340/.255,0,0,255,344/.255,0,0,255,368/