At checkout I was intending to pay with my PayPal credit account but the tab came up and said pay and confirm and didn't give me a choice of what I wanted to pay with so it took all of the money for my transaction out of my bank account instead of bringing up the tabs for me to choose my PayPal credit instead it took it directly from my bank account. I now have a zero balance and I have several bills being auto deducted.
It seems that PayPal will sometime change funding source due to risk. That's why it is important to maintain suffient funds in your backup funding source.
You can phone PayPal support if you need information from PayPal.
