Hi there!
My name is Yaicel, a serious worker here with high level on maths, algorithms and programming skills (in C/C++/C#). Your project caught my attention because I like challenges. Actually, it is the first time I hear about this Spintax format, and so, immediatly I made a research and went deeper on this. I understood everything and it took me just some minutes to wrote my algorithms to calculate all posible messages (still not to write out the senteces but it is an easy modiffication). I detected a set of possible conflicts (extreme situations in spintazed text) that could could be causing your differences as compared to other sources. Thus, if you wish to consider my help, be free to contact me.