Benedict XVI said that Genesis is based on a myth
Cardinal Joseph Ratzinger, now Pope Benedict XVI, in his 1995 book, "In the Beginning ...: A Catholic Understanding of the Story of Creation and the Fall" (Wm. B. Eerdmans Publishing, $13), has expressed well the view I am espousing here. He writes: "It has become clear that the biblical creation narratives represent another way of speaking about reality than that with which we are familiar from physics and biology." The creation stories "represent truth in the way that symbols do -- just as, for example, a Gothic window gives us a deep insight into reality, thanks to the effects of light that it produces and to the figures that is portrays."
Cardinal Ratzinger is not saying that the creation and fall stories are "just a myth," but that they are divinely inspired symbolic narratives that communicate reliable truth about the origins of the world. These stories cannot be dispensed with or cast aside, but have permanent and enduring value. (src)
Benedict XVI said that Heaven and Hell are not actual places
Here is a scanned copy of those pages of his book where he is supposedly said this (hosted on a non Catholic website). If you read what he said in its context, you might understand that he is talking about omnipresence of God. Not the reality of heaven/hell. This is taken out of context as with most of Church's teachings.
Benedict XVI abolished Limbo of the Children.
Nope he did not. The Church has explicitly said that it DOESN'T KNOW what happens to them. So limbo will always remain a valid theory. In other words it is not a dogma of Faith in the first place for Benedict to abolish it. It is just a theological opinion. That's it.
Limbo was never a defined truth of the faith. Personally - and here I am speaking more as a theologian and not as Prefect of the Congregation - I would abandon it since it was only a theological hypothesis. It formed part of a secondary thesis in support of a truth which is absolutely of first significance for the faith, namely, the importance of baptism. …. One should not hesitate to give up the idea of 'limbo' if need be (and it is worth noting that the very theologians who proposed 'limbo' also said that parents could spare the child limbo by desiring its baptism and through prayer); but the concern behind it must not be surrendered. Baptism has never been a side issue for the faith; it is not now, nor will it ever be." - Joseph Cardinal Ratzinger
Francis says that atheists can be saved.
No he did not. He actually never used the word "save" (or salvation) in that conversation.(src). That is he did not say atheists don’t need to believe in God to be saved.
The actual statements are inline with the magisterial teachings of the church and are no way controversial if you are a Catholic. After all peter has the power to bind and loose.