I had these problems when I first got the RSi2 irons. First few rounds were a nightmare, so off to the practise courses to dial them in and learn how winds affected them which was an eye opener.
Couple of weeks on and I'm a lot more comfortable with them. Th still throw me the odd conundrum but the scores are getting back to where I expect them.
Go learn your clubs, you'll be the one to benefit, HT clubs are awesome when you know how to use them.