Ein and Kein

Hallo: Sorry to be the pest who seems to have more questions than anyone else. (I think it's because I have vague memories from learning German the first time fifty years ago!) Anyway, my questions regarding chapter 7.3 of the grammar download are: a) the feminine genitive for ein and kein are shown as [color=darkblue:d6zuf2tq]eine/keine[/color:d6zuf2tq]. Is this modern German? I remember learning genitive with __[color=darkblue:d6zuf2tq]r[/color:d6zuf2tq]__ on the end, i.e. [color=darkblue:d6zuf2tq]einer/keiner.[/color:d6zuf2tq] But, as I said, that was fifty years ago. Certainly enough time for things to change. b) similar question for neuter genitive, which is shown as [color=darkblue:d6zuf2tq]ein/kein[/color:d6zuf2tq]. Didn't one used to write [color=darkblue:d6zuf2tq]eines/keines[/color:d6zuf2tq]? c) the plural kein is shown as [color=darkblue:d6zuf2tq]Dative keiner [/color:d6zuf2tq]and [color=darkblue:d6zuf2tq]Genitive keinen[/color:d6zuf2tq]. Is it not the other way round? Many thanks for help. Regards, Caroline