Hey!
The first part is correct, games will be added over time, and the list of supported games will increase. The second part is unfortunately not correct, the way it works now is that the save function only takes a snapshot of everything currently entered into the calculator. If you select another game and enter new values, and then click save again, the previous save will be overwritten. And the load button always loads the last saved values. The idea is that you save the game you want to base all other games on, so you don't have to enter it each time. And then select whatever game you want to convert to.
I do want to create a more permanent way for members to save all their games and settings, but this will require a complete re-write of the code so I don't know when or even if this will happen.
The old calculators are only available so users had a fallback if they found something broken in the last major update. It will be removed soon, and you should only use the new one
If you use the new calculator, your should get this output, is this not what you are getting?