you'll find that if you test especially about 2 hours after a meal your blood sugars will be raised because the food has broken down and in your blood. where the insulin can start using it. even for people without diabetes if you tested their blood sugar 2 hours after a meal it will be raised.
also your liver is in charge of sorting people out with a rise in sugar when your body detects a drop. now just becase we're diabetic doesn't mean our liver doesn't work, it just works more inefficiently. probably at the time you tested and was about 2ish your body was picking up on that as well. so when you had your 2 glucose tablets, your liver was also dolling out it's own sugar for you. rising your blood sugar even more. usually the 2 glucose tablets you took will end up going back into the liver to restore that level (sorry i'm talking in basic non scientific terms)
when you tested at lunch and was 10, that was partly the liver and the glucose tablets. but your liver is also inefficent at knowing when to stop dolling it out, that's why it would have carried on for a bit. probably 2 hours after that, on top of your liver, all the carbs you ate at lunch broken down. that's why you're blood sugar was raised. you might have found that if you did nothing (as long as you did the correct amount for your lunch) it would have just gone back to normal. that's a mistake commonly done. is correctly after a hypo. if you correct then the sugar leaves your blood to go to the liver, but then you've just added a load of insulin and then you get another hypo.
hope this helps. don't worry if you're high after having a hypo. it's quite normal for blood sugars to be a bit eratic for at least at few hours after a hypo.