@neferpitou geodjango questions are on-topic here, and I suspect likely to be answered more quickly here than at SO, so I think you should delete your original question, and then ask it here.

gis.stackexchange.com/questions/324562/… for this question should I accept the answer? As code posted by me was correct but there was projection issue which was pointed out by GreyHippo in comments. What should I do?