Deleting Clip On V2, Also Deletes Everything Below

Another thing that's probably simple but I'm not getting:
I've changed keyboard shortcuts so a simple press of the "Delete" key (I'm on a Mac and pressing the keyboard key above the return button, which is the backwards arrow button) does a ripple delete rather than deleting the clip and leaving a gap.
THE PROBLEM: When I delete a clip on V2 (video clip, text, etc), everything below it on the lower video tracks and audio tracks delete too. If I try the key that says "Del" nothing happens. If I do Command+Delete (backwards arrow) the same thing happens. I've checked to make sure the clip isn't linked to what it's deleting.
Worse still, in my Multicam clip, if I select audio to delete, it always highlights video not directly above the audio but to the left of it. No matter how long or short that edit in the multicam clip is, and yet the audio and video are both in sync when I play it.
I'm not even sure what to look up in the manual.
I've changed keyboard shortcuts so a simple press of the "Delete" key (I'm on a Mac and pressing the keyboard key above the return button, which is the backwards arrow button) does a ripple delete rather than deleting the clip and leaving a gap.
THE PROBLEM: When I delete a clip on V2 (video clip, text, etc), everything below it on the lower video tracks and audio tracks delete too. If I try the key that says "Del" nothing happens. If I do Command+Delete (backwards arrow) the same thing happens. I've checked to make sure the clip isn't linked to what it's deleting.
Worse still, in my Multicam clip, if I select audio to delete, it always highlights video not directly above the audio but to the left of it. No matter how long or short that edit in the multicam clip is, and yet the audio and video are both in sync when I play it.
I'm not even sure what to look up in the manual.