Applying theme changes dpi setting?

Hi all, I have an AT&T Galaxy Note 5. I was wondering if anyone has played around with the Theme Store. It seems after I applied some themes (Material Design, etc.), it reverted my dpi so that I see bigger home screen icons (the icons had been smaller). I immediately switched back to the Default theme, rebooted, etc. but the big icons stuck. I painfully wiped the cache partition and even factory reset the phone.... still bigger icons! Anyone else have a similar issue?