Glow says I'm a good weight, but I don't think so.

I'm 5'9" and stuck around 125lbs. I struggle to gain weight because of chronic illness. I feel best hovering around 133lbs. But Glow tells me I'm a healthy weight. Wondering if perhaps I entered the wrong frame size? Thoughts?

**Please, no envious weight situation comments. Weight problems are a struggle on both ends, underweight or overweight. If you wouldn't tell an overweight person to lay off the cupcakes, please don't tell me to go eat a cheeseburger.**