http://hvcstats.com/getnextrewardwhenstr
Returns an estimate of how long until the block reward votes will be tallied (human readable). -Says block change in 19.9 Hours

Not correct. As I mentioned in posts before, block reward will change at block 97200 because last block reward change was at block 93600. That is in ~ 80minutes... So your count is wrong and also wallet count is wrong...