Yes I noticed this as well. He (MJ Grundman) posted two updates in his original “Plugins” forum topic.
I am not sure that his posts were before or after the establishment of the SketchUcation Plugin Store.
I find that it is quite common for SPS authors to forget to update their store versions. Or they don’t really know how to, as I think the admins over there created a bunch of store plugin pages for various plugins posted in forum threads.