Wonder if its grabbing the CFBundleShortVersionString instead of the CFBundleVersion... no idea why it would be one or the other unless defined in an EA that way but I assume you mean simply how JAMF detects it in the device applications inventory.
Side question. How did you install it? When I try uploading the DMG and choosing install in a policy it fails, when running a policy with the InstallPKGfromDMG.sh script it fails there as well. Going to try making a Composer installer tomorrow maybe, haven't had this issue with other PKGs in DMGs.
I use the PKG inside of the DMGs like GEP. Otherwise I use Composer to make a PKG for any DMG that is a drag-drop-install, like web browsers. I get the LEAST headache with the Microsoft PKGs. As for "installPKGfromDMG.sh" are you using the original 2011 or "Modified by Blake Suggett on October 24, 2018" version?