That was where his explanation stopped. Given that it was reputable shop and he does this for a living, I took the guy at face value. I assume CZ will be a little more verbose in their response. In retrospect, I should have pushed the issue a little more 
Assuming you paid him to look at it, I think you are entitled to a more detailed explanation of the exact issue he found. Mainly because it may be useful to compare what he found, to what CZ says when they receive the firearm. I would call him and ask so that when it comes back you have an idea of what should have been done to fix the issue.
I noticed mine is really off as well. I was only shooting it at really close ranges, like 7y or 10y, but it is shooting a good 4-5 inches above the point of aim and to the right a bit. I'm assuming it is zeroed for way farther than that, so maybe that's it. I am gonna try to bench it and stretch it out to at least 25 before i get too worried though.
I would dial the horizontal/windage adjustment in, then step back. That way when your groups open up a little, you can just focus on elevation with the ammo you plan on using.
Mine was 3" low and 2" left at about that distance using 115gr. It took about 4 clicks of windage to get it on center, and I put about one full turn on the FSP to bring the group up a little. I found the gun to be quite accurate after this, even with the trash aluminum Federal 115gr. A bench was not available, so I passed it off to a few other people to confirm the mean POI was on center. (Which resulted in some other people having fun too)
