I have asked to implement this featured long ago in hopes of helping mobile responsive users but it seems to fall on deaf ears.
You see if you load 0-2 posts, the second 10 posts will ease that initial load time that is killing the responsive mobile users.
It's inprofessional atm. Loads so slow to mobile web browser that it's just no good.
There needs a Initial setting and the regular AFTER initial load of x2 Posts is done.
Basically this speeds things up a lot. It sucks waiting for that initial load to finish all 10 posts in order for ANY user interaction to work.