Because the expansion of the universe is not limited to the speed of light. Space itself was expanding, NOT the stuff inside it.
Doesn't work. If we all started out from the same point n billion years ago, then the light we see from everything that started with us must be no further from us than n/2 light years. (I.e. n/2 years to get that far away from us and n/2 years for it's light to reach us.) But of course this assumes that everything that we see emerged fully formed from the Big-Bang explosion which even Big-Bang advocates do not assert.
ML/NJClick on the image to go to Amazon.