Because it is not what that cvar do:
Code:
// Choose how to follow the mapcycle, when anyone vote for next map, i.e.,
// no votes on any map on the voting list, but there are players playing.
//
// 0 - choose a random map from the current voting map list, as next map.
// 1 - follow your current mapcycle order.
// 2 - extend the current map.
//
// Default: 1
gal_extendmap_allow_order 1
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