snp heuristic and lot sizes

Question: I have 4 snp ppms with lotsize ranges 0-100,101-200,201-400,401-800.
I have my product set to lot for lot on the product lotsize tab.

I get two order for the same day that are 500 each. The snp heuristic will not create an order.

If I increase the lotsize of the top ppm to 1000 it works. I looks like it is not repecting the lot for lot requriement before it tries to select a valid ppm.

any ideas?

Answer:
Please check for the setting in material master that clubs daily requirements.
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