#1: I spotted and tracked you first.
#2: We merged (at a great deal of altitude, I might add - not usual territory for an A6M5), and I picked you up on the fly by, and you didn't.
#3: You did not manoeuver afterwards, and I saw you slightly above me. I got into your low 6 o'clock, and slowly snuck up behind to point blank. It was so close, you had no chance.
The only way to avoid those engagements in the future is to have a wingman, or, what I often do is listen for other planes coming in. I can usually hear an enemy plane approaching, unless he's really booming me from on high.
You were by yourself, and I saw you first. I'm also quite used to picking up dots on full real servers now, and that helps. I was so close, you were toast. On the very next sortie, I came across Gryphon in his P-47, and blasted him into bits - 38% bullets hit, and his fuel tank exploded! (I'm normally around 4-5% bullets hitting the target.) If you're that close, there's not much chance.