POKEY keyboard scan (tech question)

[Danjovic]

Hi folks,

Reading the datasheet of the pokey chip it occurred me one question. Let me explain:

 

The binary counter inside the Pokey drives the lines K0..K5 that should be connected to some multiplexers then to a matricial keyboard. 
Whenever a key is pressed, the state of input line /KR1 will go low, and pokey stores the value of the counter K0..K5 and keep counting.

"If /KR1 goes low before the next time the binary counter equals the compare latch then there are two keys depressed and both are ignored" (quoting the datasheet)

Then my question is: 
Since Atari 5200 uses only the lines K1 to K4 on the multiplexers/keyboard matrix, there should be at least 4 values for the internal counter that will return zero for the same key pressed; for example key "1" pressed will brought /KR1 down on counter positions 0,1,62 and 63 and Pokey would never detect it as a valid single key.

So how do 5200 works? Did the 5200 set the bit "Debounce disable"?