I'm 99.999% CONVINCED this supposed Bangladeshi quake is completely bogus, non-existent.
The Bangladeshis themselves admitted they don't have an actual working seismic network.
This is either the original 8.9 earthquake mislocated with a bad magnitude, or one of the aftershocks to the 8.9 in the Andamans mislocated with a bad magnitude.
Local agencies in the Third World have a record of really badly botching earthquake info. Unfortunately this one has made it out on the wires and on to cable news crawlers and taken on a life of its own.
You can't "botch" a large earthquake, the whole world feels the vibrations. The US network picks up quakes 6+ in intensity.
I tend to agree with you.
The USGS doesn't list this quake on their earthquake website.