Grapes are not on the protocol. They are very high in sugar. The serving size for a grapefruit is 1/2. A handful of strawberries can be interpreted differently by different people. I usually think of it as about 6, but it really depends on the size. If the strawberry count were critical, the protocol would say something specific.

I don't see anything wrong with spreading out meals. There are cautions about putting items together, or doubling up things, but I don't remember reading anything about spreading them apart.

yes, you are allowed to split up the food anyway you'd like- as long as you don't eat 2 servings of something at the same time. we frequently recommend this to people who have issues with low blood sugar.