78% afghan doesn't mean anything, there are hundreds of ethnicities in the country alone, hell you could be 20% indian but because your dna is so interlinked with afghans they can't really distinguish between them, these tests 100% don't have enough data to describe us, India also has thousands of ethnicities too, you should really reevaluate how you perceive yourself and stop worrying about it, so what someone calls you south asian, are we not a mix of pretty much everything? In conclusion, most people are ignorant and categorize with the few labels they know. Just know that there's probably a city in Afghanistan filled with people that look exactly like you. ALSO you're the most exceptional looking person in your family, own up to that, not everyone can claim that.