I've not had many good outcomes in dealings with Ancestry or its users. As JAKnighton says, they make no money from corrections so they don't seem to bother. I've frequently found errors in entries, including one classic in which an ancestor was recorded as still working as a lorry driver at 124 years of age! The author had merged two sets of different family records to come up with this gem.
As a general rule, I suggest that a useful guideline is to look at the number of supporting documents and actually check that they match the records shown. If there are any errors, it's probably more helpful to contact the author of the information (although you can sometimes get a frosty reply).
Good luck!
Peter