Fiskars 01-005874 Titanium Softgrip Comfort Loop Handle Rotary Cutter, 45mm, Gray

did anyone get this cutter with a dull blade. mine is so dull i can't cut anything without it missing a large section of what i am cutting.

does the 'thumb button' have to be pressed to cut with this? Or does it 'lock' so u don't need to put pressure on your thumb? (carpal tunnel issues)

Can this be used to cut thru batting - about 1 inch?

Is there a pinking shear rotary blade available?