Using Watchdog Timer as a time base

Using Arduino Project Guidance
5

Hello, this might belong here.

I'd like to use watchdog timer interrupt for 8sec/1sec timebase. The problem is when I config the watchdog for 1sec timer (after it was running for some time on 8sec without any issue) it goes crazy. Here is my watchdog setting.

 //watchdog setting
  MCUSR = 0;      // clear various "reset" flags
  if ( warningActive == false )
  {
    WDTCSR = bit (WDCE) | bit (WDE);      // allow changes, disable reset
    // set interrupt mode and an interval
    WDTCSR = bit (WDIE) | bit (WDP3) | bit (WDP0);    // set WDIE, and 8 seconds delay
  }
  else
  {
    WDTCSR = bit (WDCE) | bit (WDE);      // allow changes, disable reset
    // set interrupt mode and an interval
    WDTCSR = bit (WDIE) | bit (WDP2) | bit (WDP1);    // set WDIE, and 1024 ms delay
  }
  wdt_reset();  // pat the dog

So when warningActive = true, I'd like to use 1024 ms delay, but instead of that, I get far more often watchdog interrupts. Should I configure it differently under "else" branch?

Thanks in advance.