image is not showing

i’m using wordpress 3.3.1 on mysite

i just want to ask, on my site, there’s a category link and the search bar

when i click the “film” categories, my wordpress showing all post of the film categories without the first image

and also when i search something in the search bar, wordpress shows some article, and the image won’t show

is this any kind of bug ? or it was the way they are ?

what i’m trying to say is, when i click the categories or search article, the archive show image

thanks