Different signature with one hash

[hedgfog]

Hello, dear developers. I hope you are well-doing. I'm using Kryptology functions in my research and it works well. I'm really enjoy your product.

Could you help with one issue? I want to sign ethereum transaction with signature after the sixth round and the SignOut call. I send the same hash to the fifth round in several runs, but each time I get a different signature. Is this really correct logic?

Thank you in advance for the help!

Kind Regards,
Ahmed