What is the proof that she has characteristics from both eggs? The articles you posted were awfully complex, and I didn't see any explanation as to how they knew that both eggs produced one person. I'm a bit skeptical as to how they have reached these conclusions.

I can say that she does not have two souls because that could not fit into the Biblical framework.

Romans 3:3-4 "What then? If some did not believe, their unbelief will not nullify the faithfulness of God, will it? May it never be! Rather, let God be found true, though every man be found a liar."

True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin