Experience Bar Auto Changes

[geoff511]

Hi,
Since re-installing computer and game, anytime I do anything in the game the Experience Bar keeps changing from Adventure Experience (orange) to one of the other styles. WHY?
If I make something, it changes to Tradeskill Experience (purple)
Kill things, it sometimes changes to Alternate Advancement Experience (green)

Is there a setting to stop this and if so, where ?

Thanks