A: I would have to assume that it is not a Emin7 but Emin7b5, and that would also be the right progression for "Stella." It makes pretty good sense:
You see, A phrygian = F major, and F major = E locrian. So that scale is a good match for Emin7b5 right? And the A phrygian is a pretty good match for the A7, especially as the A7 chord, like in stella, is a A7b9 chord. A phrygian = A-Bb-C-D-E-F-G = 1-b9-#9-4-5-b6-b7. I don't think these are the best scale choices for the progression but it will work. Better would be G melodic minor for the Emin7b5 chord (E locrian#2), and Bb MM for the A7 chord (A altered). The A phrygian mode would work better for a A7b9sus4 chord.