I went back and checked most of your last three days of reverts using that tool, and I found quite a few other cases when it had misbehaved (all exept one had by now been fixed by other editors). It seems to be broken when the diff between the vandalised page and the page you revert to is more than around 45k (i.e. blankings), although in one case your tool only restored 15k. It's a rather nasty bug since reverts by well established users like you isn't likely to be checked by RC-patrollers. So I hope it's fixed now, or, if not, that you manually check your reverts when you use the tool, especially when you revert blankings of big articles.