Responsive project sizes

Hi, using Captivate 8.1

Trying out responsive projects for the first time. I've gone to Viewport Sizes to get sizes for ipad/iphone etc

But everytime i publish a file and test it out it always scrolls, i dont want any scrolling at all

Can i check this is right...

Iphone - One size portrait

Tablet - Obviously for the ipad, this is what i also see landscape view on my iphone 6. Is that right ?

Desktop - Obviously desktop

I'm trying to get the right settings so nothing scrolls down but having a few issues. Can anyone post their size settings ?  Also is it normal for 'tablet' to appear on landscape view on a phone ?

Thanks