Junho - Your groups are fine, bordering on excellent for your first time with a new weapon. Well done.
It's going to take some practice to get used to shooting with that size weapon again, but nothing in your targets leads me to believe you have a "problem". The groups are tight and they are slightly off center. Once you have a tight grouping, it's much easier to move that grouping around.
If you were all over the board and had shots scattered everywhere, I would be concerned, but that is not the case.
On the FTE - it might be that the mag gave you a problem, it might be that you need a little time running some ammo through the weapon for a "break in" or it might have been that you just limp wristed the last shot. Did it happen with every set, or just on your last set of seven, or what?
All in all, there is nothing there that I see that I would be worried about. A little more practice and you will be shooting dimes.