Weird behaviour in player movement settings

I decided to learn the adc role a bit and for that i found it convenient to use "Shift+MB2" on "Player Attack Move Click" and "Player Attack Move" Set 2, so that i can kite well and see the range indicator or my autoattacks, which helps me a lot. But every time i start a new game, this setting doesnt work anymore and it is also very hard to reconfigure it to that settings. At first, the game sets "A" to "Player Attack Move" set 1. That way i can't see my autoattack range anymore. Additionally reconfiguring it to the state i want is really hard, because often the game just doesn't want to unbind the "A". So i go back to default settings and then another problem occurs: Often the game just deletes the other "Shift + MB2" setting, when iI try to reconfigure it, which is really annoying. Any ideas what i am doing wrong or is this some kind of advanced spaghetti code?