Grub2 gives me trouble after each new distro installation

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http://unix.stackexchange.com – I believe I have a "bad" grub2 setup for each time I install a new distro, my PC system fails to boot. Here is my boot info. It appears that grub is installed on all disks (probably my fault of being lazy and just running this tool called boot-repair). I would like to install grub onto only one disk's MBR which is where my linux installation lies. If this is a "good" choice, how do I do that? PS: I've tried grub-install /dev/sdX but I think grub is still installed on all other disks as you can see from my boot report. PS2: Here is the output of fdisk -l. (HowTos)