Q: Why is some of my music being sent to cloud and I have and never have activated cloud but most of the issues started when the up grade to El Capitan was suggested and made

Sorry, that I did not explain it clearer.  Most of the music I had was available but a few weeks ago when I clicked on a particular song, I received a message that the file could not be found and did I want to locate it.......on other songs when I clicked on them the iCloud symbol pops up and after about 30 seconds the song began to play.  Also those with the cloud symbol will not record to disc.  I have not activated iCloud but the symbol shows up behind the song title so I assumed that it was stored in iCloud.  I may have not mentioned that since I upgraded to El Capitan my system has been unstable......I have lost approximately1800 songs many of which was not downloaded from iTunes and are not included on the purchase list....because when I purchased them I was probably utilizing another ID and password which  awhile apple changed my ID to my email address and I had to change my password again at that time.

Thank you for your response Gail.