Outline is loaded asynchronously

Why outline on the main page is loaded asynchronously? First load the left part of the outline, and then another part. How can I fix this?

On my site I notice the same thing, what it is doing is loading in the objects and then it floats things to fit the block.  It is normal behaviour and I would not worry about it.  It is probably more noticeable on a slower connection than a fast but not a lot one can do. 

It`s a matter of one-two seconds (and I have fast connection). However, it is quite annoying :P

I have the same problem

what you can do is body onload use function that freeze page untill fully loaded.
Or create blur lil transparent black. that way it is less annoying.

It is nothing to worry about.  Look around the net, visit sites, are they worrying about such things?  Your members won't worry about such things either.

Well if it takes about 10 sec or longer and if you have a slow connection or the site is just slow it will be annoying!
I would say: don't overkill your main home page with info or blocks. That way the page will load faster.

Keep the amount of items in the Outline reasonable to the amount of new data that your members load.  I suppose it would be nice to know if members click the "Load More" button on the Outline or if they just then to look at the first ones presented in the Outline.

People on slow connections know about having to wait for content to appear.  I have seen the OutLine do as the OP shows but never saw it as a problem.  The solution would be to not display anything until all the items are loaded and then have the Outline pop in.  I think I would rather just leave it the way it is than to have it "pop in".