ive had this problem before while only playing 1 account

my solutuion was pull mouse apart and clean the buttons, but dont reccomed that

either

1.(if buttons are seperate from mouse ie they can be pulled off) cleen underneath the buttons and the sections they sit on

2. clean lense of your mouse (could of bumped buttons as mouse hit dust) use a cotten bud and gently bush the lense

3. try new mouse

i am not sure wat you have tryed. but option 3 worked for me

1 and 2 worked for a little bit but still had problem