Is it possible to manually amend a Breadcrumb in an direct article ID link without assigning a menu to it?
A hidden menu is not usable because Joomla does not allow the hidden menu to share the same name with the main menu. Thus, there is no way I can show the proper breadcrumb hierarchy in relate with the main menu.
Joomla error when attempt to create and save a hidden menu with the same menu names as the main menu:
Save failed with the following error: Another menu item has the same alias in Root. Root is the top level parent
Have you tried assigning the article to a specific menu, but without assigning it literally (in menu manager), if that makes sense!? It is possible to do this if you understand how the Joomla Dynamic url structure works, for example:
What this link is telling us is that its a content (article) related link that will show article number 100 that is shown with menu item 53.
And so in relation to your issue grab the article number and the menu where your Breadcrumb module is showing and bingo it will show.
Take note though whichever menu item you decide on will be highlighted when visiting this page, so presumably it will need to be relevant. And all other modules for this menu item will be shown too.
Home > Our Businesses > Real Estate > Our Businesses > Real Estate
I figured that this is cause by
1. the link to the "article without menu" is already from: Home > Our Businesses > Real Estate
2. This "article without menu" is under Our Businesses > Real Estate category
Thus, I need to remove rather than adding items on the breadcrumb.
But thanks for the tips on using &Itemid=xx for adding extra breadcrumb items which I may need in the future.