I agree. Next time, concentrate on your trigger pull and shooting form. If you're confident that all's well and you are still shooting left, adjust the sights. All Glocks I've ever seen has the rear sight dovetailed so you can tap it over.
As for the stove pipes, Does it happen with every mag? If so, then you might be limp wristing a bit but I don't think so because it's only the last round. If it's only with one mag, them it's the magazine. You might want to replace the mag spring.
"An unarmed man can only flee from evil, but evil is not overcome by fleeing from it"