deleting clips - everything to the right closes up
I have multiple video tracks running, as per screenshot - but when I highlight one clip for deletion, hit delete, everything further along the timeline closes up/moves left to where the deleted clip was. I'm clearly missing something here, but if anyone can point me in the right direction, I'd appreciate it :) Thanks.
(This has only just started to happen so maybe I clicked/unclicked something inadvertently)