There's nothing to fix here. The newer 3.6.1 Admin updater only includes the latest 3.6.2 client software. This updates someone's system properly when they're coming from and Admin version prior to 3.6.1. If you already had Admin version 3.6.1 installed then then you'll be offered the 3.6.2 update on Lion systems. The update is not necessary for 10.8 - 10.8.2 as the only bug fixed was with iChat on Lion. Of course you can manually install the 3.6.2 client update on your Mountain Lion systems if you'd like.