Hello there
I added a few sources and got an error on 2 of them and everytime I add a new source I get a few pop ups
1. Sub-process /bin/bzip2 returned an error code [2]
2. Error refreshing data
GPG Error
Happened to me too. There's a way with ssh that is too over my head. Here's what I did. Download ifile Then go to apt/etc//apt/sources.list.d. Then go to cydia list. When you open it you can delete the bad sources...write them down first.