Weird Happenings... Am I Going Crazy?

Let's begin the post with this picture...

My car back in November 2013 with my Slide to Unlock Magnet.

This is a picture of my car sometime around the first week I got it back in November 2013. On the car I have a "slide to unlock" magnet, I posted this picture sometime in November 2013. A friend got this magnet for me on either my 21st or 22nd birthday. I remember telling him that I was going to put this magnet on my first car, and I did. 

Within a week my Slide to Unlock magnet was stolen. I was coming back to my car after work and noticed that it was gone. I contributed the missing magnet to the neighborhood I was in. It wasn't the safest neighborhood and I should have taken the magnet off every time I left for work. Needless to say I got over the missing magnet and just went about my everyday life.

Fast forward to today (well March 2, 2014), I left my house approximately at 1:24PM driving around deciding which Starbucks I was going to go to. I normally like to pick different starbucks each time I go to study. I arrived around 1:45PM and was there doing homework till about 3:48PM. During my time at Starbucks I thought I saw someone that I recognized. I immediately felt anxiety and my heart rate rose dramatically. This was a new feeling for me. I didn't look back up at the person I thought I recognized until 5 to 10 minutes later. I then noticed that the individual sitting across the room from me wasn't who I thought it was (unless he left during the time I was freaking out and someone else took a seat). I had been texting a friend during the whole incident and she calmed me down and I continued to work on my homework till I decided to leave around 3:45PM. I walked back to my car, I opened the passenger side first and put my book bag on my passenger seat and made my way to the driver side. Guess what was there. You guessed it, my Slide to Unlock sign. It had been missing for 3.5 months and all of a sudden there it was. It was on the door of my car. I didn't even think to take a picture of it... I took it off threw it in my car and got in. It was once I was in my car that I snapped a photo. 

The Slide to Unlock sign back in my possession. 

My theories...

• Perhaps no one stole my magnet and just placed it in underneath my car as a prank and it finally fell off. Someone who parked next to me noticed it on the ground and placed it on my car. 
• Once I got home I tested this theory and it did not stick to the bottom of my car anywhere around the perimeter.

• Maybe my mom, uncle, or grandparents found the magnet and placed it on my car the morning before I left to starbucks and I didn't notice.
• I told my everyone in my household about what happened and they all remember the magnet and how it was on the fridge before I place it on my car, but they did not put it on my car. 
• I swear that I didn't see the magnet before I left to starbucks. I always have to use my keys to unlock my car since I don't have an electronic lock.

• Someone is playing a joke on me.

• Maybe I did see the person I thought I saw and he was the one who originally stole the magnet from me.
• This would mean he took it from my place of work (possibly home, but I don't remember).
• Possibly following me or a coincidence that we were at the same Starbucks. 

I donno, today (March 2, 2014) was a weird day. At least I finished my homework.