No... I never care about things like that! I never notice anyway, but I can ignore it if I do. I am aware that these are just actors and so if one wears the wrong T-Shirt, I just see it as a minor costume hiccup and move on.
The only thing that had me puzzled was Lol saying Combo was 17 when her dad beat him up. I'd thought he was 32 in the film and she was 19/20. I doubt Combo was hanging out with a 5-year-old though. Therefore, I have decided that Combo was rounding upwarRAB when he said "20 years ago, when I was 12" to Shaun and he actually meant "14 years ago" and was 26-years-old in the film. That leaves him hanging out with an 11-year-old Lol when she confided in him, which is a bit more plausible.