Have you reviewed your citations, found an incorrect category, fixed it only to have it show up again months or years later?
This has happened to me. I thought I had all possible sources of incorrect and old info for InfoQuest Technologies, Inc. updated and maybe a year later it happened. I logged into Moz’s local service and saw a category on our listing at Infogroup with a category that was in an entirely unrelated industry. Hat cleaners! What?!?
I contacted Moz which contacted Infogroup and got the category removed. The explanation Moz passed on was the category was added due to either a bug or process at Infogroup and it had been removed.
At this point I wasn’t convinced it wouldn’t come back and started to dig more as I’ve seen this category come up before.
What I found was a duplicate listing at dnb.com which had InfoQuest in the wrong industry\category. The duplicate listing was supposed to have been resolved a year or more ago but wasn’t closed/removed fully as I could still see it when doing a search on dnb.com. What you can’t see when doing a search on dnb.com is what industry\category they think you are in. You may not even know they track this if you never saw one of their reports. I only realized it because I looked at a sample on their website.
I think dnb.com is usually good on having accurate data which can be a problem in that it will be trusted even if it’s wrong and you wouldn’t expect them to be wrong so you wouldn’t be looking for a mistake there. I’ve never understood how the duplicate listing with the wrong industry got created. Maybe some day I’ll find out but it might just remain a mystery.