First of all, I think it's very cool that you are working through the Ward Jarvis recordings. I admire you for that!
Intonation--speaking in general terms from my own experience which may or may not apply to you or to others--I'd say, it comes. And goes. And comes back better. And it seems to be an upward cycle that happens over a long time. So, think about it, but maybe don't worry about it. I actually like some of the places in your recording where you're probably not quite on the pitches that would make your tuner flash green. :)
When I listen to your B part, I like the groove. It works for me.
When I listen to the A part, I think I hear a lot of sawing. That works and if you're choosing that on purpose, fiddler's choice, right?! But, if you're not, I think it would be worth the time to listen to the recording and experiment with other approaches. And, if you need ideas, maybe slow David's recording down and take a look at what he's doing?
I haven't listened to the field recording enought to be able to give you more specific feedback but I play this tune and I'm in review mode right now so I need to get back to it!