Deiete two wrong nodes in my own tree

In my tree is beside my own node - (private) Urban - and the node of my died husband - Heidi Urban (Hollona) - a third node called - Person -, no other dates for this 'Person', but below this 'Person'-node is a node of - Angela Michelle Cleall - seeming to be the daughter of me and a 'Person', with my died husband as step mother.
Angela Michelle Cleall has an own profile with own tree and connected trees (Hollona-trees too), but she isn't my daughter (and of a 'Person') and not step daughter of Heidi Urban.
There is no side panel if I click on the node of - Angela Michelle Cleall - or the - Person -. How can I delete the wrong notes? Please help.