It only let me put my first download into my iTunes library why will it not let me keep putting my songs into my iTunes library? Please help paid for this app would like to be able to use it..

I guess that the second song you want to share has the same title(like "Youtube") as the first song, if so, because two same name files are not allowed by system, you have to rename the first song or delete it from iTunes, then you can save the second one.