I’ll give you a caveat up front: I know nothing about the mobile theme.
However, looking at this line:
It seems to be a little erratic at times. Eventually it all seems to operate correctly
makes me wonder if this isn’t perhaps an issue with your carrier.
Maybe you could find a friend with a smart phone on a different carrier and try publishing a post, and then seeing if it shows up the same way on both mobiles. If so, it could be a theme issue (or possibly, but not likely, an issue with your host). If it shows up okay on one phone but not on the other, then it is likely a carrier issue.
Not quite Occam’s razor, but worth a shot.