I wrote my PhD disseration on saints and relics and there is nothing incongrous about this.
"1) His claim that he was spiritually anointed by touching the grave of Aimee Semple McPherson and his further claim that he returns to that grave regularly to be reanointed. Even Catholics, who believe that saints' relics are holy, would find this a strange claim."
In fact the cult of relics grew out of beliefs that souls of saints hovered near their tombs and were available for intercession there.
I'd really like to see you cite some sources on that one.
Catholics do not beleive that saints are ghosts or revenants.
And no Catholics I know of believe that by approaching a relic they will automatically be anointed by the Spirit.