PigGunner, the Big Bang didnt occur in the centre of the Universe, as you stated. The Big Bang formed the Universe, it didnt happen inside, and it has no centre. As for 14 + 14 = 28; it would be astonishing if we just happened to be at the centre of the Universe. Its much more likely that we arent and so something else is going on. The 14 + 14 idea refers only to the observable Universe, and not the whole thing (see below).
HB and Onetap, keep in mind that when looking at distant objects we have to take look back time into account. For very distant objects we are seeing them where they were many billions of years ago and they have moved much further away since then.
A reasonable way to begin to make sense of this is the so-called current bun model of universal expansion. Imagine being on a current in a current bun and looking at the other currents (its magic dough and we can see through it). If the bun was large enough it would look to us as if we were the central current, and as the bun cooked and expanded it would look like we were stationary and the other currents were rushing away from our central position. However, to anyone standing on any current they would see the same thing, i.e. they are stationary and everyone else is moving away from them. Everyone and no one appears to be at the centre.
Now consider a number of equidistant currents in a straight line as the dough expands. Rather than the currents moving, as such, it is the space (dough) between them that is expanding and carrying them further apart. This may seem like semantics, but it contains an important point. Given a uniform expansion, each current will see those further away appear to move increasingly faster because the intervening amount of dough between each successive current is expanding. If we say that the magnitude of expansion is 2 (it doesnt matter about the units in this illustration) then the nearest current moves away at 2, the next 4, the 6 and so on. Remember, though, that it is the dough expanding between *each* of the currents at a uniform rate, i.e. a rate of 2, and not the currents moving as such.
At some point the currents towards the end of the line will appear to move so quickly that they approach and then exceed the speed of light. Of course, anyone standing on those currents will consider themselves to be stationary and think that it is us that are somehow defying the speed of light limit.
There are complications such as the theorised inflation period (as someone else mentioned), but this is pretty much the standard model. It has problems, but solves others.
