Go to your LW library, have a look in the Uploads column. The number on the right shows attempted uploads & the left shows successful uploads. So if you saw 2/3 it would mean that 3 uploads were attempted but only 2 were successful.
Also look at the bottom of your main LW page, if there's an upload in progress it'll show up beside the green arrow pointing up You can also check the Monitor page to see more info about uploads in progress!