I have an emitter (obj_shooter) that pops out a number of balls (obj_ball) based on level, etc. The collide with any number of objects for this case (obj_block) For simplicity sake, think of the mobile game ballz. The problem I have is that the obj_ball(s) collide with the first obj_block they encounter, decreases the HP and bounces off like it's supposed to. Say it takes 2 balls to kill the block, first two hit it and it destroys itself, the balls go on to hit other blocks and none of the other decrease the HP. I'm new to Gamemake and GML but not to programing so it's probably something really obvious I'm missing.

obj_shooter -- alarm[0]
if(spawn_count < spawn_amount)
    {
        instance_create_depth(x,y,-1,obj_ball);
        spawn_count   ;
        alarm[0] = spawn_rate;
    }

No problems spitting the balls out.

obj_ball -- step


if(place_meeting(x   hspeed, y, obj_invisWall))
    direction = -direction   180;

if (place_meeting(x, y   vspeed, obj_invisWall))
    direction = -direction;

if(place_meeting(x   hspeed, y, obj_block))
    direction = -direction   180;

if (place_meeting(x, y   vspeed, obj_block))
    direction = -direction;

obj_ball has no problem bouncing around

obj_block 
Create:
level = global.playerlevel;

hp = 1   irandom(level);

textWidth = 128;
lineHeight = 18;

Step:
textToShow = string(hp);

if(hp <= 0) 
    {
        instance_destroy();
    }


Collision obj_ball:
hp -= 1;