Is 'within' affected by 'distance'?

According to the manual, ‘within’ is not affected by ‘distance’.
The position of ‘within’ is constant regardless of the value of ‘distance’.

However, if you actually test it, it will be affected.
It is detected when distance is 2 and within is 4, but is not detected when distance is 0 and within is 4.

for example,
ETOpen rule #2000332

alert tcp any any → any 4660:4799 (msg:“ET P2P ed2k request part”; flow: to_server,established; content:"|e3|"; offset: 1; content:"|00 00 00 47|"; distance: 2; within: 4; classtype:policy-violation; sid:2000332; rev:11; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Which one is right? manual or test result?

Can you share the pcap for this test as well?