I have owned several and tend to agree, it does strike me a little funny. I'd check online and compare the nicer eamples, and also google to see if you can find fakes. I don't know these coins very well and the ones I've owned were lower grades, but they were different than that. Usually looking at what else the seller has tells the story, or gives a very good indication.
I just refreshed my mind a little checking some pics and would be concerned if I bought that one.... and the more I look, the more I don't like it.