Why does my ipod touches installous say that the app i download is installed when it isn't?

Okay i had the same exact problem. I researched everywhere and tried so hard. When you download anything on installous it says installed but then dosent show up right? Usually when u download something u just close installous, and go back on it and its downloaded. Then u press install and it says installed but nothing shows up.Simply, when u download something, dont close installous right away. Click on the downloading section and jsut w8 or lock your iPod right there. This is what worked for me. O ya and make sure ur sbsettings installous thing is turned on. (Search sbsettings on ipod on YouTube) Hope this helped dude.