Posts showing up in reverse chronological order?!

I checked out my blog today and lo and behold, I saw my first post I ever wrote. After the 3 seconds of nastalgia wore off, I wondered why my posts were now appearing in reverse chronological order! I didn’t add any plug-in or change anything, this just happened “automatically” when I typed in my blog address:

My address is: https://www.georgetowncustomhomes.com/blog
My theme is: AquaFluid 1.6 by Sadish Balasubramanian; WP Theme AquaFluid by Sadish
My email is: Edward AT gtownrealty . com

Side note: now that I’m posting in my second year, is there a way to collapse my 2007 posts into one link?

Thanks for any help you can give!