Unfortunately, updating the profiles and cities didn't do the trick.
Anyone interested in looking at this is welcome to peek at my fresh D7 install.
List of 4 test users: http://greentechworld.com/browse.php ... look at in extended view... you'll see the country flags as they should be.
Then look at the map: http://greentechworld.com/m/map_profiles/
While two Canadian users show in the extended list user view, only one Canadian shows on the map. The one that doesn't show, ManuelTwo, was imported via phpMyAdmin using an INSERT into the profiles table. I'm reluctant to import thousands of users until I understand what's going on here. And unless I can import thousands of users, I can't go forward with Dolphin.
A SQL dump of ManuelTwo's profile data:
INSERT INTO `Profiles` (`ID`, `NickName`, `Email`, `Password`, `Salt`, `Status`, `Role`, `Couple`, `Sex`, `LookingFor`, `Headline`, `DescriptionMe`, `Country`, `City`, `DateOfBirth`, `Featured`, `DateReg`, `DateLastEdit`, `DateLastLogin`, `DateLastNav`, `aff_num`, `Tags`, `zip`, `EmailNotify`, `LangID`, `UpdateMatch`, `Views`, `Rate`, `RateCount`, `CommentsCount`, `PrivacyDefaultGroup`, `allow_view_to`, `UserStatus`, `UserStatusMessage`, `UserStatusMessageWhen`, `Avatar`, `Height`, `Weight`, `Income`, `Occupation`, `Religion`, `Education`, `RelationshipStatus`, `Hobbies`, `Interests`, `Ethnicity`, `FavoriteSites`, `FavoriteMusic`, `FavoriteFilms`, `FavoriteBooks`, `FirstName`, `LastName`, `OrgDescription`, `Type`) VALUES
(6, 'ManuelTwo', 'test@testy.com', 'random', '', 'Active', 1, 0, 'male', '', 'This is my headline I shall not want', '<p>Description text in HTML format, with p tags at front and back</p>', 'CA', 'Toronto', '1987-03-09', 0, '2010-03-09 09:00:00', '0000-00-00 00:00:00', '2010-03-09 09:00:00', '2010-03-09 09:00:00', 0, '', 'M1L 4V5', 1, 0, 1, 2, 5, 1, 0, 3, 3, 'online', '', 0, 0, '', '', '', '', '', '', NULL, '', '', '', '', '', '', '', '', '', 'And this is Dallas'' custom field. To not really be necessary, me thinks, given that there''s already a description field.', 'Service provider');