So I managed to unlock the final levels of both the Landscaper and Heavy Weight achievements.

For the Landscaper V this triggered the "Winter Biome" claim and when I clicked it ... it popped up again!! I don't remember what I did then but it did not trigger a third time.
For Heavy Weight VII this triggering (that the achievement has been awarded) happened FOUR times in a row!! I then thought to go to the rewards menu (just to check) and afterwards it stopped.

Also I noticed afterwards that after I intentionally lost the game (to work towards True Fan IV)(and because the board was a mess after the heavy weight run!!) that instead of 1 game I was awarded four (went from 44/50 to 48/50)(correlates with the four times the achievement popped up as completed).

In an earlier version beta glitch (if you remember the lost achievements bug) I had lost about 8 games in the True Fan count, so I guess I got some of them back :-) but still this needs fixing!

I have also sent this report (together with the zipped game files) using the bug submission form.