Can't fin how to configure 2 blocks

[ji11y]

Hello

 I have just started with presta shop and was doing ok but I can't change 2 of the image blocks as I can't find their modules. It is the images with 3 days sale and the one beside it and the block further down starting top trends.

Also when I drop down from the menu on my first category I found where to change the image and added 2 removing the shoe one and one is showing then a space and the shoe one is still there

Any help gratefully received