Layout modification

Search for support!

I want to change the layout of elgg version 2.1.1 using the Aalborg Theme.

It is possible to change the row height (see picture below 3) in the dropdown menu? How can I fix the left upper position of the dropdown menu with bottom line of the main menu  (see picture below 2). How can I reduce the height of the main menu (see picture below 1).

I haven't find out the positions in the css files. Are this parameters in the java scripts?

Second question:

I use for my login site the plugin "video homepage". I have to login two times after I am logged in. Have anybody an idea what's could be wrong.

My website: