Problems with 'port upgrade' in DP 1.32

After updating (via port selfupdate) to DP 1.32, I tried to upgrade all 
my active ports in need of upgrading as I always do with

port -vuf upgrade active

This command had worked flawlessly for me in all previews versions of 
DP, but this time I had two problems:

1) A LOT of ports (~100) apparently unrelated to the half dozen ports in 
need of upgrading (I got that list via 'port outdated') were rebuilt 
from scratch.

2) In the directory /opt/local/var/dports/packages/darwin/powerpc/ there 
is now a darwin/powerpc/ subdirectory, which contains 41 packages of 
newly rebuilt ports.

Has anybody experienced this problem? More importantly, what is the 
"canonical" way of upgrading all your active packages (those in need of 
upgrading only, of course) after the release of 1.32?

Cheers, and thank you all,

Artemio

P.S. On a totally unrelated matter, 'port installed foo' gives this 
apparently wrong answer if port foo is not installed:

Port foo is not installed.
No ports are installed.

What gives???