I had a 2010 DN5e that had a buzz @ 3rd fret on the b string.I had 2 other players try it, same results. Kinda chimey sound. I did everything I could think of, no luck.Sent it to Taylor. They adjusted everything,new nut,new saddle, factory specs. Came back(they covered shipping back) cost me a C note(used /new guitar).Chime still there. Sent it back to Taylor(they covered shipping both ways).This time they reset the neck,pulled the frets,resurfaced the fingerboard,re-fretted,new nut,new saddle,factory specs.Came back"PERFECT", no charge.I swapped it in on my 2010 GS6e. I decided I wasn't meant to own a cherryburst top Taylor.
Taylor service is Excellent. Call them.
Steve
PS Sounds like that 1st fret might be a little low right there.