Heirloom Audio Casting Submissions Rejected

I am still adding the Heirloom Audio Productions audio drama series, "the Extraordinary Adventures of G.A. Henty, to IMDb, but I have run into another snag.

Several submissions involving voice actor credits for the episodes keep getting rejected; in episode 2 ("In Freedom's Cause"), that includes James Cosmo (I) as "Sir Robert Gordon" (order 9), Billy Boyd (I) as "Sir John 'Red' Comyn" (order 11), and Joanne Froggatt as "Lady Marjory" (order 8); in episode 3 ("With Lee in Virginia"), there's Sean Astin as "General Jeb Stuart" (order 9), and Kari Wahlgren as "Mrs. Wingfield" (order 8); in episode 4 ("The Dragon & The Raven"), there's John Rhys-Davies as "Siegbert" (order 2); and finally, in episode 5 ("Beric The Briton"), there's Brian Cox (I) as "Nero" (order 3), John Rhys-Davies as "The Druid Priest" (order 8), and Jonah Hauer-King as "Lucius" (order 13).

For evidence, I have added each audio drama's separate websites and screenshots of them, for they list the cast and crew fully, and still, IMDb keeps rejecting the submissions. I would greatly appreciate some help on this.