Please explain "Being Overtaken and Passing" rules - second post

Can someone please explain the USAT Cycling Conduct of "Being Overtaken and Passing" rules to me.

I just did my first tri and had someone pull up along side of me to pass. I did not speed up or slow down but he looked over and said, "dude.........you gonna let me pass you?!!........"
He said more but that is all I heard.

I said............"I didn't know I was supposed to LET you pass me."

Then I find this USAT rule.

"5.10 Position Fouls.
(g) Being Overtaken. When the leading edge of the front wheel of one cyclist passes beyond the front wheel of another cyclist, the second cyclist has been "overtaken" within the meaning of these Rules. A cyclist who has been overtaken bears primary responsibility for avoiding a position foul and must immediately move to the rear and out of the drafting zone of the passing cyclist. The overtaken cyclist shall first move completely out of the drafting zone of the other cyclist before attempting to re-pass the other cyclist. In no case, however, shall a participant move into the path of another participant possessing the right of way."

I don't get it. Especially when there is also a rule that states:

"e) Passing. A participant who approaches another cyclist from the rear or from another unfavorable position bears primary responsibility for avoiding a position foul even if the cyclist being approached decreases speed. A participant must not attempt to pass another cyclist unless adequate space is available and the athlete is confident of his/her ability to pass the other cyclist. All passing is to be done to the left of the cyclist being overtaken unless otherwise specified."

Am I just being a little too competetive or just a newbie.................?

Help? Anyone?

Thanks.

rjd