#1
When ever im playing a song on heavy distrotion and mute the strings it makes a ringing noise and ruins the song whenever i mute!

I'm using a Line6 spider two, usually on the insane setting and usually my cheap ibanez is on the humbuker on the bridge. Is this noise to do with my cheap guitar, too much distortion or anything else? please help!!!!!
#2
I'm no guitar whizz, but is that not harmonics or something? Looks like you're doing it accidentally

Try turning down the gain
#4
Definitely too much distortion. If you mute a string, it will always make a noise; too much gain will only amplify it. I sort of had a similar problem, but I solved it by getting a great tone while having the gain around 5 or 6.