[quote=SoleAccord]
Except they were gathered together intentionally by Frieza before he realized he needed a password and he wiped out all but three Namekians on the planet, and the dragon being more powerful made sense because that was the original set of dragonballs and the ones on earth are just derived and thus weren't meant to be more powerful.:I
[/quote]

still the fact that they are there just when the Z warriors need them to defeat Buu seems way too convenient to make an excuse.