[Plugin: Boxer] can be used for multiple positioning in same box set

For example i have box set called news and in this box set i have 5 boxes so i set first three boxes as one_third,one_third,one_third_last and other two as one_half,one_half_last and i didnt get view as i wanted.Can that be done on this way or i must make separately box sets for both?

Opera newest dont show for example one_fifth_last good,she show him bigger then rest of boxes.

Can be image placeholder for box be absolute so when i set favourite image to be auto adjusted to placeholder so i dont have to make all pics same size to be in line?

i think this is a great plugin but need to be done little more fixes.Great job ppl.
thanks