1. Angular momenta: what numbers correspond to what orbitals.
[dos.evaluate(projection_list = ProjectionList([....], angular_momenta=[2]))]
I used numbers like 0,1,2, thinking they correspond to s,p,d respectively but my values do not add up in the end to the regular pdos. What is my mistake here?
Hard to say without seeing the details, but s,p,d are for sure 0,1,2. Post/send more details so we can double-check it (but we will not until August, bcs of holidays).
2. Contributions: could some explain more on this argument what it means to be left, right and all? I tried to find more information but I kept find information on LDOS
The two-probe DOS can be divided into contribution from the left and right leads, which sum to the total. I don't have the exact equation references handy, but check the usual refs, PRB 65, 165401 (2002) and Datta's book "Electronic Transport in Mesoscopic Systems" (Cambridge Univ. Press., New York, 1996).