Some of the earlier ACW sets were slightly larger than 1/32nd scale. For example the 00281 Fr Corby set, 17245 Hold at all costs, 17292 140th Penn Medal of Honor tribute and so forth were off-scale to the other sets. Look at the comparison between the "Clubs are Trumps" or "Fight'n Irish" relative to the "Hold at all 17245/17295" and the difference is there even at first glance. One of the reasons that prompted my sell-off of ERTL/Britains ACW sets was the lack of predictability regarding compatibility. Hopefully Richard Walker and co will stabilise things a bit but it seems that no matter how happy people claim to have been with many of the Ken Osen sculpts there was still quite a lot of variation in their execution. So the short answer is "when did they stop changing?" rather than "is this an abberation?"