# I've got:
# 
# ex0 at pci0 dev 9 function 0: 3Com 3c905B-TX 10/100 Ethernet 
# (rev. 0x30)
# ex0: interrupting at irq 11
# ex0: MAC address 00:50:da:37:bb:d7
# exphy0 at ex0 phy 24: 3Com internal media interface
# exphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
# 
# ex1 at pci0 dev 11 function 0: 3Com 3c905-TX 10/100 Ethernet 
# (rev. 0x0)
# ex1: interrupting at irq 10
# ex1: MAC address 00:60:08:55:8e:e2
# nsphy0 at ex1 phy 24: DP83840 10/100 media interface, rev. 1
# nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
# 
# I always have those uplistptr messages for ex1 no matter to which
# network it is connected to, now while I was writing this messages I
# noticed, that ex0 is using exphy while ex1 is using nsphy. Might that
# be the reason for it?

I note that you have different revs of the ethernet card which may
account for different phys attaching.