How did a new satellites get in the right position?

Yes - but remember that our balloon model has no other forces, just expansion. It is only an analogy for expansion, nothing else. The universe is expanding, there are parts of it that are moving away from our position at a rate that can be thought of as faster than the speed of light. This fact alone does not indicate that the expansion was even faster at the very beginning - however the evidence currently points to something that probably resembles: We can define explosion in such a way as to include inflation, but it would be confusing and unnecessary. When we normally speak of explosions we think of objects moving through local space violently from a central point of space. The word explosion doesn't really cover it since the latin 'ex' implies 'away' and 'away' has plenty of space related connotations which don't make sense when it is the space itself that is expanding. In inflation, one particle can remain where it is and the amount of space between it and another particle can be increasing. Neither particle is moving through space away from the other - in fact they could even be moving through space towards each other - and the distance between them can continue increasing.Explosion just doesn't work as an adequate description (can you imagine calling it an explosion where all the particles all started moving towards each other, but space itself stretched to keep them seperate?), and that is why expansion and inflation are preferred terms. They help avoid confusions with the kind of physical activity we would normally expect to find in what we traditionally call an 'explosion'.