Why is the Out of Africa Theory getting more and more challenged?

Remember my post showing Rh negative blood may have several birth places?

Where does your Rh negative blood REALLY come from?

The same could be the case with modern humans.

According to Aris Poulianos, head of the excavation team since 1965, the Petralona skull was found by a villager, Christos Sariannidis, in 1960. It was sticking to the cave wall in a small cavern of the cave, called “Layer 10” by Poulianos, about 30 cm (12 in) above ground, held by sinter. Its lower jaw is missing and it was “encrusted by brown calcite soon after the death of the individual”.

Poulianos (1981) dated the skull to an estimated age of around 700,000 years. Today, most academics who have analyzed the Petralona remains classify the hominid as Homo erectus. However, the Archanthropus of Petralona has also been classified as a Homo heidelbergensis, Neanderthal (Homo sapiens neanderthalensis) and as an early generic class of Homo sapiens. A. Poulianos, on the other hand, believes that the Petralona cranium is derived from an independent class of hominids unrelated to Homo erectus.

Here is where it gets weirder:

In September 1995, Poulianos presented a calcified tibia found in Triglia, Chalkidiki, which he claimed belonged to a Homo erectus form he termed Homo erectus trilliensis, and which he dated to 11 million years before the present. Poulianos believes that his discovery may challenge the Out of Africa theory regarding human evolution.