Two weeks on Steemit and I have questions

Wow I’m really liking @steemit I especially like how @unityeagle is using it. she is combining videos of herself for example I resteemed a post she made while riding her bike around her Netherlands neighborhood using a 3D Audio headset. Let me tell you it was an amazing experience I listened to it on a regular headset and I felt like I was right there it was awesome you can hear the people on the left walking on the side of you the birds in front of you can hear behind you you can hear the train moving around you .
I live in South Florida so to be able to see and hear such beautiful sounds from a place so far away and feel like you are right there , that for me anyway is one of the best posts I’ve seen here , I would love to see more stuff like this . Especially when the wind blew , you can hear the wind blowing around you that 3D Recording headset is amazing, I’m going to get one just to make videos for Steemit.

As far as my questions I just have two and it’s concerning the numbers and percentages are confusing.

1. Why does that number drop after i upvoted a couple people

2. In settings it gives me option to leave at 1.0  or change down to as low as 0.001 What does this all mean