I opened my wallet today to buy more siacoin and I noticed my balance now shows 0KS.  I haven't downloaded an update or messed with anything because of some problems people have been having.  I had previously found the wallet.dat file and copied it onto my desktop as a backup.  I just replaced the wallet.dat file that was in sia with the one I had on my desktop and it still says 0KS.  It also is showing a different address.  How is this possible? Any ideas on what I should do? Thanks