Update: I found the wp_huge_itgallery_gallerys table, and note that my new gallery has no entries beyond the name. I don’t want to have to recreate the entire gallery from hand, so I will see if updating the table entry to match the working galleries solves the problem.
Updating the table entry for the new gallery resolved the problem. However, if I go back and try to change the view type or any of the options, the table entry is cleared (besides the gallery name) and a few defaulted parameters.
Hopefully this will help. I created a new gallery and set the view as desired, and saved. It worked. I then added over 100 images. At some point, the view setting again got cleared. I looked in wp_huge_itgallery_gallerys and all that was there again was the new gallery name.
I again updated the fields manually in the db. I then went back to the previous gallery, and changed the view options. It also reverted back to all cleared in the database. So, whenever I now make any kind of change to the view settings they all get cleared.
I see that others are having problems with pagination, which I am also using, so perhaps this is related.
Resolved by using Chrome instead of Firefox 40.0.2. Images now add correctly, and gallery settings changes now work.