Galaxy S5 :: Grouping Outlook (Exchange) Calendars Into One?

I recently upgraded from a Samsung Galaxy S2 to the S5. I am loving the phone except for the syncing of the Outlook (Exchange) calendar. I use multiple calendars in Outlook (for my work), but only want one of the calendars to sync to my phone (my main calendar only - the others are group calendars that I do not need to see on my phone; however, I am the owner of each of these calendars [not sure if that is important or not]). The problem I'm having is that the S5 is grouping my calendars into one calendar. I cannot choose which calendar I would like to see/sync, so the group calendar information is overpopulating my calendar (I use the S Planner calendar that comes with the Galaxies). I really just want the one (main) calendar to sync.

I thought the issue was in the S5's on-board S Planner calendar, so I disabled that and downloaded the Google calendar app. Much to my surprise, the same thing happened. This lead me to believe that it is something in how the S5 is syncing with the Exchange calendars.

I also have a Galaxy Tab 2 running the most recent software update (I don't know what it is), and it only syncs the main Outlook (Exchange) calendar ... not all of them. This is also how it was with my S2.