The current implementation of -a shows duplicate names

[cerebrux]

When the packages that are available to be upgraded are shown, the -a causes to show packages 3, 4 or many times (especially if there various versions of their same package, in the same repo).

Ref code:

uCareSystem/ucaresystem-core

Line 128 in 1243e83

sudo apt list -a --upgradable;

This is just visually unpleasing :P . Instead if you don't use the -a flag, the packages are filtered