chadorireborn - I looked into it, and indeed that file has an issue. After resizing it keeps the old image sizes in the project file. Strangely it only happens with that project, and not other files I tested resizing and importing into C2. While I haven't found the cause yet, I do have a solution. If you load the resized scml file into Spriter, and then resave the scon and scml (see below), it will import correctly into C2. Please let me know if you have any issues.
—, by the way, I think I may have forgotten to mention this on this forum when it was released, but there's an extra save option in Spriter now under Custom Save Options. It allows you to have Spriter always automatically save (and automatically overwrite) an scml file every time you save a scon file, which is convenient for C2/Spriter projects.