Copyright protection

Hi,

For a while I have been posting songs on your web page. Most of these are my rearrangements of often well known songs. When posting I then select 'Public' and give the name of the song on which my rearrangement is based. So I acknowledge it. In my rearrangements I make my own interpretation of the song, often by listening to the original and making changes which I think improve it, like adding different instruments and adding extra riffs, phrases etc. However I usually do not significantly (maybe some timing change and/or an extra note here and there) change the melody line - otherwise the song would be unrecognisable.

Now for some of these songs, most recently 'Get Back' - The Beatles, or 'Unchained Melody - Righteous Brothers', I will receive a message from you that the song has infringed some copyright, and has been converted from 'Public' to 'Private'. I don't have a problem with this, but this does not happen for many of the rearrangements that I post, and they remain ' Public'. Am I just lucky? If I change the title of my song - to say 'Get Back -orchestral', but still say it is based on their original, would this help? Any suggestions?

Henry