I am trying to empty the wallet on my android after having a few issues with it, but the wallet won't actually send anything, it receives coins fine but won't ever send any.  After about 16 hours i do a blockchain/transaction reset and my coins come back so that makes me believe that it obviously never makes it to the net.  Can I get some help here.

I have been looking around and not sure if this is the right place for this, but i am using the bitcoin for android as a wallet right now and would like to back it up. Is there a way to do this or should I use a different wallet and only use the one current one for small amounts?

Also does the wallet need to be backed up again with every deposit or will the original back up sync when I restore it?