First thing you should do is post Screenshots of what you mean
if it happens in certain apps, that can be how its supposed to work, as Google has demanded since android 4.0 that every manufacturer also includes its holo ui. An app can choose whether it uses the holo ui or the "stock" ui. Nowadays a lot of developers use the holo ui so the app becomes consistent across devices. In that case you also get the the "raw" android menus, at least assuming that is what you mean with raw.
Also the back speaker is for when you're playing music or when you put the phone in speaker mode while calling.
Hope this was helpful for you, if it was don't forget to press thanks
LG GW620 / HTC Desire / HTC Desire S / Nokia Lumia 800 / Samsung Galaxy S2 / Sony Xperia P / Sony Xperia S / HTC One S