regarding auto tithe, it looks here is problem. Why does wallet choose wrong coin roll? I have a lot of rolls with coin age >2.415 and amount > 859
An this happens every 5 minutes in debug.log(tithe=5)

BiblePayMiner::Choosing to tithe with coin age 2.300208 and coin amount 4989.001000 with a total tithe amount of 9.660000 with current pog difficulty of 2250.069728 with buffered tithe amount of 9.177000.  CreateTransaction::Requiring specific coin age 2.415000 and coin amount 859
BiblePayMiner::SendTithe::Error - Unable to send tithe - Amount 9.660000, Error Unable to Create Transaction: Unable to locate coins older than minimum_tithe_coin_age. ResendWalletTransactions: rebroadcast 2 unconfirmed transactions