Also otherwise known as our biological reflexes that in principle have nothing to do with memory
Maybe you were once very hungry as a kid and although you don't remember it, your subconscious did?
This evolutionary ghost theory is something I have never heard before

. Reading your story, it was reincarnation that actually came to my mind. Basically your soul in a previous body could have experienced starvation, hence it made an imprint on you, even if it has nothing to do with this life.
I would say I am pretty neutral on this subject in general, but I have experienced things and heard stories that are hard to explain without considering reincarnation as a factor in them.
In particular, I have some very early memories (or memories of memories) of being left at day care as a 3 year old, where I had an irrational fear of being left behind by my mother, even though that was never actually going to happen considering my mother's personality. Then I have another memory from day care where, with the other children playing, I had at one point the irrational urge to protect myself and tore a support leg from this toy kitchen. I remember clearly that I thought this thing looked like some kind of gun that I could use. I took it and hid under a bed until the 'battle' was over. I should point out that I wasn't being harassed by the other children; rather none of them understood what I was doing, and afterwards I probably didn't understand it myself. I should also point out that at that time nobody had realized yet that I had relatively poor eyesight and couldn't really see what was happening around me, nor could I watch television properly, etc. So you let me ask you, how does a 3 year old, who has never seen a gun before, not in real life, not on television, who has such poor eyesight that he can't distinguish people's faces from more than a meter away, have an instinctive reaction to seeing the silhouette of an assault rifle and thinks that he is in some kind of battle?
To add to the above, I found out in later life that I am a pretty good marksman (with corrective glasses obviously) although I neither have real interest in it, nor have had any training. But still, somehow, I have talent for it. So I can't help but wonder if I was a soldier in a previous life.
Another story, which my parents told me, was that when I was very young, I often did not behave like a child. They had a friend who allegedly had a lot of spiritual insights. This person told them back then that I was apparently an 'old soul' that was confusing previous lives with this one.