I am on my mother's checking account. Will that knock her out of Medicaid?

Just make sure that every bit of her money is accounted for. Make sure it is all spend on her needs and care.

I understand having your name of her accounts. Too many banks (Mom's credit union for example) have just too many hoops for to jump through to allow me to write a check to mom's health insurance, or drug prescriptions, or hair dresser. Finally have myself on her accounts too.

Just keep good records if you think there is even an outside chance she will need to go on Medicaid.

No, it is still her money. In my opinion, the best way to apply for Medicaid is to go thru an attorney that specializes in it. Usually family law or Will and Trust firms. They can guide you through the process and they actually do the filing. I'd ask friends for referrals.