So I don't think I should have to do anything with the outlet itself, correct? I'm more worried about blowing the switch by plugging in anything else into the bottom (always on) outlet.
If I am reading your description correctly, the constant-on outlet has no power routed thru the X10 switch. Therefore, nothing that is plugged into that constant-on outlet could affect the X10 switch.
However, as already mentioned, one has to be extremely careful about what one plugs into the switched outlet since that
does go thru the X10 switch. While you might, today, only plan on plugging in an incandescent bulb, there is no protection at all if you,
or anyone else (spouse, guest, etc), ever plugs something else in. Even an innocent change from an incandescent bulb to a compact fluorescent might cause major damage to the X10 switch.