No they aren't ( especially when the standards have been wittled down to almost nothin )
Yes they are. You can't pick and choose your Saints. If the Church makes someone a Saint then they're a Saint and we know for certain they're in Heaven.
The 1967 New Catholic Encyclopedia: "The dogma that saints are to be venerated and invoked as set forth in the profession of faith of Trent (cf. Denz. 1867) has as its correlative the power to canonize. ... "
St. Thomas Aquinas:, 'Honor we show the saints is a certain profession of faith by which we believe in their glory, and it is to be piously believed that even in this the judgment of the Church is not able to err' (Quodl. 9:8:16).