Galaxy S5 :: Apps Randomly Opening On Their Own

I have an issue with my S5. I updated from KitKat to Lollipop 5 days ago. After reading some of the horror stories associated with Lollipop and battery life, lag, phone performance, etc., I didn't waste any time before doing a full factory data reset. I am pretty sure the FDR worked, since I have had absolutely no problems with battery life, lag, or my phone running hot.

However, I have this weird issue where apps will randomly start on their own. Two examples, the first is that I opened my recent apps and noticed a whole bunch of apps in there that I had 100% most certainly not opened at any time since clearing my recent apps. The second example occurred this morning. I did a 10 minute walk to work and when I got to my office, I noticed that Rocket Music Player had opened and was playing my music. I highly doubt this happened due to any physical touch because not only would the power or home button have had to be pushed, but then the screen would have had to be swiped, the Rocket Player opened, and a song clicked on to start playing. I highly doubt this all occurred in my pocket.