I have a weird thing happening

I have a game where it spawns a large monster. each time it spawns one of there monsters, it checks its level. If its levels is 1, the i sets it health to 3. If its level 2 then it sets its health to 5. In the game, when the score reaches equal to or greater than 20, the level of the players ship, and the monster is set to 2, yet the monster still only has the 3 health. Please help.

Nowhere near enough information. Either post a .capx or show your events either in text or via screenshots.

Like zenox98 says that is not enough information but from what i read in your description the level is only checked on monster spawn so the existing monster is not affected? So have it change the level and then right away adjust the health too..

Nah. The monsters are spawned every random(3, 6) seconds so it would make sense to set the health on create.

Like stated above, please provide a capx and a better explanation.