I’ll try to help. Sounds like a posture problem or maybe an alignment problem.

First of all, your grip and swing should be the same for every club so keep it simple. If you’re trying to hit different types of shots, then make all the changes you can imagine. Experiment.

As far as the difference between your driver and your irons go, picture this:
The driver is the longest club and irons get shorter as you go up in number. To swing all of the clubs on the same plane, you have to adjust the width of your stance, distance you stand away from the ball, ball position inside your stance and your spine angle. Sounds like a lot, but with a little practice it isn’t.

When I hit my driver my feet are a little wider than shoulder width apart, I’m standing farther away from the ball, ball position is forward in my stance and my spine angle is more upright.

When I hit a 8/9-iron or PW, my stance is slightly narrower, I’m standing closer to the ball, the ball position is a few inches forward of the middle of my stance and my spine angle is more bent over.

A few things to keep consistent with each club might be:
1. Arms hang straight down from shoulders no matter what club you’re hitting. If you do this, this will help you set the distance you need to stand away from the ball.
2. Divide the width of your stance in half. For a 5-iron, position the ball halfway between the middle of your stance and your front foot.
3. Move the ball forward or backward 1 ball for each club you go up or down.
4. Keep your back straight, bend from the hips, do not hunch over.

Good luck. Hope it helps.

Aaron makes some good points. However I would differ on his suggestion as to foot placement. the width of your stance should not change. It should be as wide with the 9 Iron as it is with your driver. Also. You may be sliding your hips instead of turning them….This sometimes causes your swing to get steep resulting in huge divots and poor ball contact. My honest recomendation is to seek a good teaching Pro for a lesson They are not that expensive and it takes someone seeing first hand what your swing is like to be able to fix it.
Trying to fix a golf swing by committee is as worthless as several things I can think of.

Okay, instead of all of this complicated possibilities, let’s just try something simple.

Step 1. Go to driving range. Stop at red lights, stop signs and obey all local laws.

Step 2. Get yourself a bucket of balls. Yes I know I left out the getting out of the car part, putting on shoes, getting clubs out of the trunk, etc.

Step 3. Instead of going out there and just blasting away, take some easy swings. Forget about the woods for this bucket. Start with your pitching wedge and work your way up. Only take about a 3/4 backswing and accelerate through the ball nicely. We aren’t worried about distance at this point, just ball striking.

By taking about 25-35% off of your normal swing, you can focus more on striking the ball pure. Remember, with your irons, you are going to have a slightly steeper angle of attack on your swing. Concentrate on hitting down on the ball cleanly and you should see your divots start directly under the front of your ball.

Once you’ve gotten the feel of how you’re angle of attack feels and where your arms are at impact, then add your distance.

My suggestion is to start out hitting irons off of the mats at the range. Take practice swings to see where the clubhead is coming through the zone and place the ball where the clubhead comes through. Play the ball near the center of your stance. Once you get the hang of hitting it off the mats switch to the grass. It is a psychological thing for me. I know that it is the same whether I am hitting off artificial turf or grass, but it helped me out. It might do the same for you.