The following is a list of interpretive issues that William Branham got horribly wrong. this is important because most message followers hold him out as an infallible interpreter of scripture. If we want to know what a passage of the Bible actually means, William Branham is the best source on all counts.
In fact, message preachers generally encourage message followers that encounter a passage in scripture that seems to be at odds with William Branham's interpretation to simply put it "on the shelf" until God reveals to them why William Branham has the correct view.
But here are a number of biblical issues that William Branham seems to have messed up badly:
You are currently on the article that is in bold. William Branham taught that salvation (and healing) only lasts as long as your faith lasts. He also believed that you could have the Holy Spirit and go to hell.
What the Bible teaches
In his letter to the Ephesian church, Paul states:
A person who believes in Christ are sealed with the Holy Spirit, and that sealing is until the day of their redemption:
It is impossible to lose your salvation in the same way it’s impossible to stop being your parents’ child. You are children by birth. Once you are born, you are born. Even if you are not acting like a well-behaved child, you are still a child because you are a child by birth. Similarly, you don’t hold on to God, God holds on to you. If a parent is holding a kid’s hand, even when that kid lets go, he is still connected to their parent because the parent is still holding on.
Furthermore, the author of Hebrews states:
for he has said, “I will never leave you nor forsake you.” 
If you read it in the English translation, Hebrews 13:5 says, “I will never leave you. I will never forsake you.” I hate almost every English translation, because in the Greek there are two negatives in the first clause and three negatives in the second clause. What God is saying to those upon whom he has put his grace, those whose relationship with him is not based on the legs of a man or on the strength of a horse but on his sovereign grace and his action, “I will never, ever detach myself from you. I will never, ever, ever forsake you.” 
Quotes of William Branham
Somebody says, "How does Divine healing... Is it... Does it last all the time?" It lasts just as long as faith lasts. And salvation lasts the same way, just as long as faith lasts. When you feel that you're not saved any more, you're not saved. For it's by faith are you saved through grace. Is that right?