Hello!
We have introduced changes to lay Auto-Dutching: previously, it wouldn't lay at all if the book% was less than 100%, which made quite a few users unhappy. They did not see any point in this feature if it could not place lay bets automatically.
So we decided to let the program place the bets regardless of the book, as there is no solution that would satisfy everybody. Overrounds (when book% is >100%) are extremely rare anyway, so you wouldn't be able lay for profit on ALL selections in the market. You will have to pick some of them to do Dutching and expect loss on others.