ToME: the Tales of Maj'Eyal

I'm playing a Alchemist (great class btw) and i always get "Ambushed" when i'm encountered on the World Map for a fight, um why always??

Because trying to kill you is the only meaningful interaction npcs can have with you in this game.

Not all wandering parties will ambush, only the ones colored red are hostile. The majority is anti-magic though, so a magic user like an Alchemist is getting a lot of hostiles.

It just says Ambush all the time.

who has been ambushed? you? or them?

Ok, ambushed just implies i've been encountered, not that i've been surprised or trapped, i guess the game makers mean that i'm just having a hostile encounter, ambushed could make sense if they moved into me, but i'm moving into them, ambushes normally imply an advantage which there apparently isn't.

Get Zomnibus addon, turn ambushes off, or at least auto-avoid for X turns after an encounter, if you want.