Ok .. now this is unusual ..
can you try to "dmp" the private key for the first account ... the one with the BTSX....
you can do that by
wallet_dump_private_key BTSX........if this works you will see a string starting with 5..... ... keep it a SECRET!!!
add that private key to your existing account...
goto -> your account -> Keys -> import private key
when done you might need to 'rescan' (in console) the whole blockchain .. takes a while
if the wallet dump does not work .. please give us the error message