No upgrading of 3 outdated ports

[Marko Käning]

Hi,

I ran into this:
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$ port installed outdated
The following ports are currently installed:
  GraphicsMagick @1.3.25_1+q8 (active)
  ld64-latest @264.3.102_4+llvm39 (active)
  python35 @3.5.2_1 (active)
$ sudo port upgrade outdated
--->  Scanning binaries for linking errors
--->  No broken files found.
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Isn’t it weird that 3 ports get listed as outdated, but not upgraded?

Greets,
Marko