The text of 1582 given for Mark in the collation section of the website differs from the text given in the transcription of 1582. The transcription is correct, but the collation text is incorrect. For example, at Mark 7:24 in the collation section, the text given for 1582 appears instead to come from 565. I am not sure whether this problem applies to every verse of Mark, but it applies to numerous verses.
Thank you very much for pointing this out! The Collation page is a work in progress and any results from it would need to be checked. We hope to have it working properly eventually. The transcriptions of each manuscript though (in Manuscript Workspace) should be accurate.