SC Tom,
on the 1st point, it's kinda normal : the ball is coming on his stomach, so he jumps on the side to center the ball on his racket. After, he's on wrong side of the court, and he notices he's too far to play the ball, so he doesn't come back... It's not really perfect, but it's not too bad either, I guess... But for next update, I'll make him come back, I just tried & it looks more natural...

After, I changed 2 things for Build 72 :
- before, the CPU was telling to his partner : "hey I'm too far, so go get the ball" ; now, he says : "hey I'm too far, but it looks like u're too far as well, so I'm giving it a try anyway"
- and I loosened a bit the conditions to try an interception (if I recall well

)
so it's normal you see more of these now.
sam250,
no idea why the announce is still there ; I checked and it's removed correctly on the official version.
The Build number just tells you it's ok about game engine stuff ; but if you modded files from previous version, it can still create problems.