I really think people tie themselves in knots trying to stick EXACTLY to plan. The 1/3 superfree thing I see as being a "rule of thumb" you should aim to achieve it more often than not to keep on the right track but dont fret about fitting it in 3 times a day, seven days a week.
Its Slimming World trying to make sure you naturally limit your free foods by filling up on superfree, but as long as you aim to do that most of the time, you arent going to completely wreck everything if you dont manage it at every single meal. If you start trying to justfy it by having fruit etc afterwards - unless you were planning on eating some fruit anyway, then you are just eating for the sake of it - how is that helping?
If you look at some of the EE recipes in the magazines, books, starter packs, even they dont follow it all the time - one of the starter pack books had fish chips and mushy peas as a free SW meal (SW made obviously, not out of the chippy!) - no superfree there!
And fruit salad as an evening meal? i think you are going overboard there trying to compensate - you should have a normal, food optimising meal of 1/3 superfree - 2/3 free - if I just had fruit salad for dinner I'd be starving within half an hour!