Yes. The ebooks are there, but when you downloaded them, you had a choice
whether to OPEN or SAVE them. If you OPEN an ebook, ADE will download them
and bring it up in Reading view. If you SAVE them, ADE will put them in
the library, and you'll see them in Library view.
You can 'fix' this. ADE uses an area on your hard disk called My Digital
Editions to store the ebooks. You can open ADE in Library view, then put
your cursor on the small arrow next to the word 'Library'. A drop-down
menu will show up. Click on 'Add Item to Library', and another window will
open up, permitting you to specify where the ebook is and its name. You
can double-click on the ebook name, and then click on OK. The ebook will
be added to the Library. You can't do multiples - only one at a time, so I
hope you didn't download a bunch.... Also, ebooks that show up in Reading
view will still show up there, so you can finish reading them.
If you need more help, just read the ADE HELP section (the F1 key from
either Reading or Library view). There's lots of information about how ADE
works, and what you can do with it.