Disable Playback of View Keys: It to restrict the view motion (disable any rotate, pan, or zoom motion of the modelwhile playing the animation) Say you added a rotary motion to the model. But if you select "Disable the playback of the keys", you will not get that motion.
Disable View Key Creation: It is actually meant to prevent any further changes in viewsfrom being included in the animation. But you can overcome this by RMB on the key and selecting replace key.
Joe, I beleive you have "Disbale the playback of the keys" selected and hence you can't see the other option. RMB on the "Orientation and Camera Views" and then select "Disable the playback of the keys".
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