Hmm, mine defaulted to 1024 x 768; but maybe it depends on your computer or something.
Dan, look at the bottom of the "Upload Images & Video" box near the top of your Photobucket page (have to be signed in) for "Reduce to ..." and see what it defaults to. If it really is set to 320x240, then click on the "more options" link to the right and chose the "1 megabyte file size" option.
Of course, that won't change the photos you have already uploaded. To take advantage of the new setting, you'll need to upload them again.
To share the album with us, look near the upper LH corner where it says "Share this album". Copy & paste that link into your post here. Eg
https://s401.photobucket.com/albums/pp94/tinman1958/
Or if you would prefer, email the photos to me and I'll put them up for you. You've got my email (hint : It's my screen name at ca.rr.com)