About Behavior Score

Greetings,

I have several questions regarding Low Behavior Score and Punishments. Recently I got banned for 1 month for communication abusive, that's because I
I took people in jokes for flaming me in any reasons. Thing is, I got 1st of it 9.7k behavior score then I got flagged with red position at Communication Abusive because people seems disturbed for their own faults and they feels like to flame other people then to report. In that case I got first of all muted 48 hours, and in that day after 48h mute applied after one game which I couldn't say anything. I got banned for 1 month for negative behavior. Now I have 8.585 Behavior.
Now, because I heard a lot of issues at Single Draft with low behavior people, and I am definitely worried because it's my 1st ban on this account and I wanted to be sure to not be flagged anymore, I got more question about the report system and anything else:

1. There is a chance that my behavior still decreasing after getting reports even for no reason? Like even if I do nothing wrong but people in low behavior still reporting me for 1 or 2 simple mistakes which I didn't wanted to do. As an example: To die because for trying to deward as support, or placing by mistake 2 sentries at the same spot(basic mistakes).

2. Does the report system is focusing on that main issue? Like even that my recently game I didn't do nothing wrong, but it takes action on what I done last game.

3. Now in Single Draft, even if I have 8.585 Behavior Score, the behavior placement it will be the same? Or I have to play even with the lowest ones, around 2k – 5k?

I think that's all my question what I have, even your advice which I wanted to hear from you, It's always welcomed. I really need it to get rid of this situation. I'm really worried what's gonna be after when I'm get unbanned.

P.S : I'm sorry if I do some grammar mistakes. I'm not a good writer or even to explain really clearly in English. I hope it to understand, if you have something uncleared, let me know and I will explain again what I wanted to ask about it.