Has anyone found that a few seed combinations make the same plant???? or am I just losing my mind... love the game by the way very addictive!!!!

Yes. And there are multiple combinations for flowers also.

ive also seen the same type of plant produce different seeds. ie planted 10 of the same plant, then used 1 of another plant to pollinate all 10. the 10 produced two types of seeds (though each of the 10 produced the same seed type). some seeds were crossbreed seeds, some were base seeds (if that all makes sense)