Archives won't show ALL my archives for the month?

Hey guys! I need your help! I’ve having an issue with my archives search as well as the category search. When I select say the archives for all of May… it only shows one page worth of archives. It’s the same with the categories. It only shows one page and won’t include a link to view more posts on more pages. Does this make sense?

Any idea what’s causing this and what I can do to fix it?

http://revivalphotography.com/blog/

Thanks!
Heather