Ancients

[Baal]

The AS is quite clear that instead of a fixed amount of experience you get ONE level since v 1.10.

MMm.... I seem to be reading a different page than you then.

http://www.battle.net/diablo2exp/quests/act5.shtml
Reward: The maximum experience gain is limited to 1 character level.

It says, the max gain is 1 level, it doesn't say you will gain 1 level everytime.
Although, this doesn't mean much as the AS has had different information about the same thing on two different pages in the past.

Hope this explains it for you.

Laters,
Baal.