I opened it up today and took a closer look at the sear spring. It didn't look quite right.
Trigger5.jpg

I pulled the spring out and there is some obvious deformation. Question is, did the deformed spring start causing sear problems, or did the sear problems cause the spring to deform?
Trigger6.jpg

I removed the sear and spring and then reassembled them. I am pretty sure the spring ends are where they need to be but it still looks a little wonky. Still suffers from the same DA problem. After reassembly:
Trigger7.jpg

I'll order some new springs and see if that helps. Can anyone recommend a good source for these springs?