Vizio tablet, Onkyo Remote app for android, and TX-NR515...volume doesn't work/GUI alignment

So my wife and I have been using our phones to run the Onkyo Remote app on the back deck which has been really cool. That said, one thing we didn't like was using Wifi on our phones and wearing out the battery so quickly. Recently we also haven't been able to use the Onkyo Remote app for volume control. It just hasn't been working. So we figured we'd concentrate on getting things working on one device. We purchased a Vizio 8" tablet and put the Onkyo Remote app on it. Looked like it installed and the app runs but the interface on it is a little off. Can't read some of the labels on the buttons and in addition the volume control doesn't work which may be attributable to the GUI shift...not sure. Does anyone else have this issue right now? Would really like to get this working on this tablet.