Right now, if you have Wikipedia results ranked above "Normal" there is a good chance that it will appear as the first result for any query for which it has a specific page. This is sometimes desired, but as a side effect, if you are searching for a business, it will sometimes appear above the business' home page.
For example, if you have Wikipedia upranked and search for "Oracle" (the most recent example that I noticed this problem with) you will get a Wikipedia entry for the company as the first result, and the second result will be https://www.oracle.com/. This doesn't happen for all results - Microsoft and Apple have their business page above Wikipedia - but it happens for some businesses.
I imagine this is much worse if you have Wikipedia "pinned."
I would suggest a setting that allows allows you to uprank/pin exact matches for a a business or anything else with its own homepage.