Oh... I understand about the chicken skin now!
I think you were probably okay on the veggies. When you said small cucumber, I didn't know how small. It could have been a tiny pickling cucumber.
Regular onion is pretty high carb, but if you eat green onions (spring onions, scallions) instead, you'll save some carbs.
You are right about the snack making your percentages just about perfect!
Don't worry about calories. Dr. Atkins says not to count them. Just eat on plan and they will usually work out.
The only time you might need to count calories is later on if you are a very slow loser (like me). Then you might have to keep an eye on them.
But don't cut the fat... just more chicken and fish and less beef will usually do it.
Also, when you are on Atkins, you have a metabolic advantage. That means you burn an extra 200-300 calories a day because operating on a fat burning metabolism instead of a glucose metabolism is less efficient.
So although your calorie intake looks a little higher, you are actually getting a slightly lower equivalent.