For a single 2-Page spread scrapbook page, that may be the case. But, if you are doing a book, it is reasonable to put similar events on the same spread, or arrange your photo book however it makes sense (chronologically, grouping events, etc.) . What I know about sororities would not even fill a thimble, but is there something that happens after the installation of officers, or beforehand? Or, do you have a story about the candidates or officers that you could document on the left side, and then place the photo on the right side (or vice versa)? If you use a similar theme for your book (colors, style, font, etc.) it is perfectly fine to do one side of your two-page spread for one event and the other side for another. You also can rearrange the templates to fit your needs. Remove photo slots, add them, move them, etc. There are no rules!
Have fun making your book and I hope you'll share some of it with us in the gallery!