When you're first putting it on it's more just a guide (have all three line up straight with the line on the block) the service manual will also say how many teeth are between the right cam sprocket to the crank, then from that to the right cam. As soon as the belts on and the tensioner is uncompressed and you turn the crank those lines won't line up on the belt with the lines on the sprockets anymore especially if it's a different amount of teeth for each side like the ej22 is 44 on one and 42.5 on the other.
If it made a some unusual sound you might have hit a valve(s) with the piston