I got a new debit card about a month ago it has be...

I got a new debit card about a month ago it has been working fine debiting from my joint account. starting this week it started debiting from my personal account without any notice. I know it is the same card because I only keep the one card with me. This is on top of the fact that 9 times out of 10 when we deposit money at the drive in they put the money in one of our accounts but not the one we specified.