mpkg upgrade is a bit confusing

[vadi2]

If I do mpkg upgrade successfully, I'd expect a second use of it to tell me "All packages are already updated to latest version" or something of that sort, but I get this:

mpkg update
Updating the list of available packages.
Package list of repository MudletPackageManager updated.
Finished updating package list.
mpkg upgrade
Staging package MudletPackageManagerfor upgrade to version 0.0.2.
Finished installing package MudletPackageManager.
mpkg upgrade
Staging package MudletPackageManagerfor upgrade to version 0.0.2.
Finished installing package MudletPackageManager.
mpkg upgrade
Staging package MudletPackageManagerfor upgrade to version 0.0.2.
Finished installing package MudletPackageManager.