It seems that you yourself never actually experienced 4:0 draws, otherwise you'd have known that they do not affect the chain of wins. I am telling this from my experience in arena and in the temple of the chosen. Yes, you do get a draw, no, the chain is not broken.
Point is you left the arena back then thinking it does break the chain. But, it doesn't. People would exploit arena/ToC/CC exiting to break chains/feats of their enemies. That would mean exiting abusing is a mean of war and judging by your logic admins do everything to make players stay in battlefield.
In other words, you say one thing, believe the other, while both of those things are wrong.
And don't send me to talk to arma, or set, I had enough of exiters and we hired enough exiters to piss off hewming to know it does not break the chain. If you still don't believe, you better re-read the thread about your exiting, arma and set were both shocked you did not fight, not because they got broken chain (which they didn't). Your leaving was absolutely pointless. Live with it.