Shortened time of operation of all stance skills for allies and pets
for example stance "One wolf Pack" works for me 12s. and 3s allies
All skile stance differently writes differently works
Um... i do not get what you are asking or trying to state.
IF you look at the trait you have equipped in order to make stances affect allies, https://wiki.guildwars2.com/wiki/Leader_of_the_Pack , it increase the duration on you by a lot, and it then shares the effect to allies, with a shorter duration than the base skill.
sometime the issue is not the skill or the traits its the way its just informing so take the trait off and use a friend use stance for the base. Then put your trait on to exstend its effects and see if it changes the numbers. If it does not change the numbers let me know what you got for the times and i will see if something is up.