Timeline insert and editing issues

Hi guys, I'm very satisfied with the new beta 15 but there are a couple of aspects that I can not manage and I'm confident the pro users will be able to give me an answer:
1) When i change the speed of any clip placed in the timeline and subsequently I change its length the entire timeline is affected. (I.e. if I make it longer by slowing the speed it will overwrite/push the next clips). There is a flag/option that I can set to avoid that? On Premiere Pro the clip never overwrites the next one.
2) On Premiere Pro I can drag the clips on the timeline without overwrite the existing ones by using the Command/Ctrl keys I’m struggling because this doesn’t seems to work on DaVinci 15 Beta 7. Also the swap doesn’t seems to work, could be this caused by my custom key mapping? I don’t see any option to customize those actions.
Any thoughts is appreciated.
1) When i change the speed of any clip placed in the timeline and subsequently I change its length the entire timeline is affected. (I.e. if I make it longer by slowing the speed it will overwrite/push the next clips). There is a flag/option that I can set to avoid that? On Premiere Pro the clip never overwrites the next one.
2) On Premiere Pro I can drag the clips on the timeline without overwrite the existing ones by using the Command/Ctrl keys I’m struggling because this doesn’t seems to work on DaVinci 15 Beta 7. Also the swap doesn’t seems to work, could be this caused by my custom key mapping? I don’t see any option to customize those actions.
Any thoughts is appreciated.