It was not actually a misunderstanding.
In fact, Fang Xinxin had intentionally instructed Liu Ling to describe him that way.
At the time, she had known that Fang Manxue was following her to come up with ways to scheme against her. Thus, she had decided to lay a trap for her.
This way, Fang Manxue would get an opportunity to put her 'schemes' into action.
Of course, if Fang Manxue had no intentions of harming her and left Liu Ling alone, her instructions to Liu Ling would have been futile.
Weng Jingke suddenly realised she had not covered the microphone on her phone. Hence, the other party had caught the entirety of their conversation.