There's such a lot of layering in some of my songs, especially the three classical guitar based songs - Seesaw Marjorie Daw, Merlin's Song and Sweet Lady Life.
There are a great number of added tracks, over-dubs, etc. designed to give the final product a very rich and full sound, and with so many sound sources, it is very easy for them all to sound a little "clunky" or unpolished before editing.