This whole contradiction about Spock and Sarek meeting while they are estranged reminds me how over at Star Wars, Grievous and Anakin act like they never met in Revenge of the Sith, yet a Clone Wars episode shows them right next to each other during a prisoner exchange (admittedly Anakin was unconscious at the time, but Grievous wasn't).
Anakin: "My powers have doubled since the last time we met Count!"
Dooku: "Good, twice the pride double the fall"
Entire effect of this exchange is lost when the Clone Wars cartoon shows Anakin and Dooku fighting every other week.
Obi-Wan: This time we'll take him together.
Anakin: I was just about to say that.
Season 6 of the Clone Wars shows that the last time Anakin, Obi-Wan and Dooku met, they already fought him together.