Brake Calipers too snug (Pirate Jack A body disc brake kit)

I am having an issue with my brake caliper not wanting to fit on my disc rotor.
A disc brake caliper tool doesn't seem to compress it in any for more space.
I managed to get one brake on the passenger side but the brakes are so snug I can barely turn the rotor; the driver side dust boot tore in my attempt and I had to order a replacement.

Is there something I am blindly missing?

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