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sparrow, read this thread and see what is up with it. I know some of it is high end $ but I haven't read it all. Maybe info you could use in there.
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I have no experience with that razor. I googled around and found some guys on forums that say they like it and it has the same blade retention system as a Parker. Not familiar with that one either. ...

Those are rough to get good shaves out of. Break the blade in half and insert it into the holder right ? Not surprised you're getting irritation. Those blades are designed to be used in double edge...

Irritation, burn, is many times caused by too much pressure. Check out this tutorial here. Might help. A blade sampler pack is the way to go to find the blade that is best for you. For me the sharper...

Welcome to SRP. Generally cut throat razors refers to open blade straight razors. Also known as barber's razors. What you describe is a DE (double edge) razor. That is what Derby makes blades for....