There are two marriages 1780 of a Thomas Walmsley, occpn "joiner" - one at St. Peter, Liverpool (8 Dec 1780), the other at St Leonard, Walton Le Dale (8 Aug 1780). Indeed a Thomas Walmsley "weaver" married 1779 at Walton Le Dale.
Is the 1780 St Peter, L'Pool marriage the one you refer to in your opening post?
These marriages close together really muddy the waters.