Buffer work ok but I realized that if you talk to the buffer, then you walk far away without closing the npc window, you still can use the buffer. So i think you know what I mean...

I summoned myself with another Character (Arcana Lord) with "Summon Friend" Skill, and still allowed to use the buffer, of course I know you cant use it when you are PK/Combat mode...

Anyway, I dont want this. Any chance to avoid this problem?

You are using old outdated files, and your buffer can work even on those files if you make it AI wise.