3 Portfolio questions

Hello, 

2 questions : 

1/ When you transfert a Collection from LightRoom to Porfolio, how can you make sure that the target will use the personalized order of Lightroom and not the capture date? 

It drive me crazy as once tranfered, I need to change again all the order of my photos in Porfolio 😞

2/ Is it possible to move multiple photos in once when you want to change the order of the photos in the grid

3/ How can you change the cover image of a Portfolio collection. It always take the first one.