Henry Adams’ admission

Managed to buy this document on line recently. Don’t know much about the legalities of old documents and wonder if I’ve got it right with this one. Shoreham miller Henry Adams owned a number of properties during the 19th century including a bakery/shop in the High Street, a windmill in Mill Lane, a house in Victoria Road and another also in Mill Lane.
The only one of those that was subject to copyhold of the Manor of Lancing was the shop in the High Street and, I guess, the reason why his ‘admission’ of 1857 involves Lancing Manor. If I’m wrong or if anyone knows there is more to this than I can see I would be grateful to know, thanks.
(Lancing copyhold properties are shown on the 1782 Survey map http://www.shorehambysea.com/wp-content/uploads/2018/02/9.-1782-Survey-Map-with-place-names-added-in-1949.jpg
and Henry Adams’ story on  http://www.shorehambysea.com/mills-millers-millwrights/ )