Hi Todd
This is currently the expected behaviour, sorry. While the OpenSim account creation while creating the Joomla account is part of the plugin jOpenSimRegister, the OpenSim account creation AFTER the Joomla account has been registered (and verified) is part of the component jOpenSim itself. Unfortunately I did not find the time to update that part to the same behaviour yet
As next step I plan to change the plugin, so inworld accounts will be disabled until the joomla account is verified (of course as a configurable value) and then plan to bring this all together into the component itself ... it's just a bit lack of time, that keeps me away from finalizing this.
Greetz
FoTo50