Hi Soju,
The issues #1 and #2 happened because we both misused the qListForm working with Document Libraries.
For #1 the field Name is the name of the document and can't be edited manually neither can be added manually in the Display Fields of the qListForm property.
This field gets populated once a document gets uploaded and we edit the document (using qListForm or OOB ListForm)
For #2 we tried to use a qListForm with a wrong Form Type. Once you change this with a EditDocument and/or Upload Document everything works as expected.
Please check the QWP docs for more details about the form types and how they work with lists and doc libraries.
PS
I still wan to check your qListForm and the doc library template.
Please check