The dot stuff is always from official page text /me thinks/ (not necessarily from the logo itself), e.g.
Quote:
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「東方花映塚 ～ Phantasmagoria of Flower View.」は対戦している振りをする弾幕シューティングです。
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from
http://www16.big.or.jp/~zun/html/th09top.html
however, Touhou Hisoutensoku doesn't seem to have the dot:
http://www.tasofro.net/touhou123/index.html
wiki
agrees