hwid ban

hi
i had one ban before after i bought some cells from a buyer here,
i did something stupid and shared my two new accounts with a friend
both of the accounts got ban in few days but we didn't know
until i logged to one of them and i get the ban message
talked to my friend and he told me he played one game only on each account and didn't get ban or anything
my guess is he has hwid ban and both my account got ban because of that

but the problem is, i got ban warning messages on my PC
2 times

i want to be sure do these 2 bans count?
because if so, i may have hwid ban too now
and how can i know ?
do i have to buy new account and test it ?

Yes, I would buy a new account for cheap right now as it is cyber monday // black friday and then test it out then.