Responses
No I also thought that must have felt like a slap in the face for her
Nope. I would prefer myself as a "landlord" ε=ε=(ノ≧∇≦)ノ
Rereading the first chapters, it seems to me that she's the one who added her contact to his phone, so she's probably the one who chose "landlady". (But no, you're not, I'd be disappointed too.)
Am I the only one that would feel disappointed if my crush had me in his contacts as "landlady"? No? Just me???