Lothario, don't worry about him being overseas, these are international system of units-based, used everywhere in the world besides the US and some carribean countries. I had the same but opposite reaction when I went on a US site on cholesterol...mg/dL, what the hell?
But its true that creatinine increases as a function of size and muscle mass and diet (high meat intake can increase creatinine 10-30% and that's not talking about creatine intake), maybe a recent training might increase it a bit althouhg I haven't reasearched this.
But remember that lab tests normal values are most often adjusted for 1.70m2 surface area (which is averaged out over the population, which depend among others things on weight and height). So its a bit like the Body Mass Index, it works well for basically everybody, except the people on T-Nation.
For exemple, the Harrison's Principle of Internal Medecine's lab values indicate a normal of under 133 umol/L. So for a guy your size (6'4'' 240...that's pretty much out of the averages, especially if you're fairly muscular) I wouldn't be too concerned about it, but its better to have a physician who suspects too much than not enough.
For your calcium levels they seem in the lines of 2.2-2.6 mmol/L, unless what you show is ionized calcium which would be averaged at 1.1-1.4 mmol/l and put you above the limits (if that were the case, you wouldn't be feeling fine right now I believe. I can't see why he would be concerned about it, but then again, we don't have your medical history, so most of the comments you get from us don't mean jack
As for a simple cyst on the kidneys, more ofthen than not they are harmless and if they don't inflict pain or cause symptomes, they are not cause for treatment. More rarely they can hamper kidney function, become infected or start too bleed, sometimes can cause high blood pressure.
Hope everthing ends up being fine and dandy for you,