Yes, people can understand total blindness much easier although you can sometimes have the reverse problem of people helping wheras no help is really needed or even wanted.
Yes, I've had that happen to me before. Sometimes it's not uncommon for me to have a 15 minute conversation with a sighted person telling them that I *don't* need help and that the only thing I need is the answer to a simple question (such as, "Is Smith Street directly in front of me?").
On the other hand fluctuating vision, functional blindness and partial sight can be harder for people to understand. My ex flat mates just never could understand my functional blindness and kept accusing me of faking it. Functional blindness (or what they used to term hysterical conversion) is NOT the same as faking it.
Very true. One of my best friends has 20/200 vision and is frustrated at having to constantly explain what she can and can't see. Some people have even accused her of faking it because "legally blind people can't read print."
There is also seems bad feeling among certain blind people towards those with more sight.
Yes, I saw this kind of thing taking place while in training for both of my guide dogs. However, I've also seen the reverse -- particularly in residential schools for the blind. Case in point: totally blind students aren't given the same privileges as partially sighted students. For example, totally blind students must be accompanied by a partially sighted student when they go off-campus even if they are able to travel independently.