Incorrect Error Alerts for Posts That Do Not Exist

Hi,

I am receiving the below and other similar numerous error notifications from my website 404 to Start set up:

===========================================
http://parden.com.au
False URL: http://parden.com.au/garden-maintenance/502/
Referer URL:
User agent: Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
Remote Host:
Remote Addres: 207.46.13.23
===========================================

What is puzzling me is that I don’t have posts by that URL name.
My posts are categorized ie: in this case Garden Maintenance
but my posts itself is in the permalink name ie: http://parden.com.au/working-your-soil-so-you-can-grow-healthy-plants/

I unfortunately get loads of these 404 alerts for numerous websites and am very keen to get to the bottom of fixing this, so that I only see legitimate error notifications.

Would greatly appreciate your assistance.

Many thanks,
Sean

https://wordpress.org/plugins/404-to-start/