Hi there

i assume you are using the standard databse which is set to do exactly that as it does not have smaller diameters as default

you will need to alter the existing segment bends in the product list to include sizes under 250dia or imperial equilvelant

you will also have to remove the smaller diameter pressed bends from your service tab bend properties

you may want to read up on how to setup a product list etc first as this is not a simple step and instructions can be found in the help file

hope that gives you some insight as to why that is happening