Moscow, Bulgaria and the OCA consider the OCA autocephalous, the other Patriarchates and national churches consider their status as you have described it.
Not all autocephalous churches have chief hierarchs titles "Patriarch"--the Church of Greece is lead by the Archbishop of Athens. (And remember Archbishop and Metropolitan reverse roles in terms of honor between Greek and Slavic usage.)
Yes, thank you for the reminder. In case of Greece, the reason for Archbishop is obvious -- the Greek Orthodox Church sees itself not only limited to Greece, but rather as only part of the Greek Orthodox Church. Giving Patriarchate to the geographic area of Greece would limit the claim. Besides, the Ecumenical Patriarch exercises control over the Church of Greece, hence the Church of Greece is an Archishopric of the Greek Orthodox Church.
Same with Albania, Finland, the Holy Monastery of St. Katherine at Sinai and I believe the Czech Republic.