IB Data and Backfill Length History
1st VPS - Windows 2012 Server AB version ? did not show backfill correctly so we eliminated
2nd VPS - Windows 2008 Server AB 6.27.1 64bit build date Nov 2, 2017 has IB after some work and shows backfill lengths correctly
3rd VPS - Windows 2016 VPS Server AB 6.2.1 64bit build date Feb 17, 2017 has IB but did not show backfill length correctly, upgraded to latest AB 6.27.1 and now backfill length is correct.