Just to confirm that this problem is also still in Windows 10. After 5 of 5 games were completed on Oct 23, the calendar read 5/6, blue with a check mark, not green for all 5 completed. Then tried completing one of the games a second time to rectify the situation, as a result there are now 5/7 games completed, and it is still marked blue.
This is a clean install of win 10 not even an upgrade.
Furthermore, score synchronisation between the solitaire collection versions for windows 8.1 and 10 using the same Xbox userid works only very sporadically and there is no apparent way of forcing a sync.
Prefer the windows 8 version of this game, the new version has forced half minute commercials all the time.