What is wrong with my setting what do i need to change

Hi all. maybe i did something wrong in my setting but now when im trying to move and copy an item all the items are moving. in all the tracks and its not grouped. What do i need to change? Also is there a way to drag and copy with the CTRL and not the ALT

In prefs check mouse modifiers for media item and media item bottom half. Set the behaviours there how you want it.

You probably want to check the 'ripple edit' mode button on the toolbar too. You may have inadvertantly clicked that.

... and make sure you have selected only the item that you want to move/copy.