Starterware/STARTERWARE-SITARA: gpio pin set high with no reason

Tool/software: Starterware

Hello everyone,

i need your help! I don't know what i am doing wrong but it drives me crazy, so please help me.

I am trying to set the pwm module but i have noticed something really crazy taking place far before i use any pwm-relative functions.
With the following piece of code (and only this), i measure 3.3V in the pin 34 (@P8 header) in my beaglebone white.

GPIO1ModuleClkConfig();
GpioModuleEnable(SOC_GPIO_1_REGS);
GpioPinMuxSetup(GPIOP8_34, 6);
GPIODirModeSet(SOC_GPIO_1_REGS, GPIO_PIN_NUMBER_A, GPIO_DIR_OUTPUT);

while all the above arguments are defined as:

#define GPIOP8_34           (GPIO_2_17)      //(GPIO_2_17 is defined in pin_mux.h file of starterware)
#define GPIO_PIN_NUMBER_A   (17)

(and SOC_GPIO_1_REGS is defined in soc_AM335x.h and GPIO_DIR_OUTPUT in gpio_v2.h file of starterware).

How is that even possible???
I mean the above functions are not supposed to set high the aforementioned pin.Why is that happening and what should i do?

Thanks in advance!