Disbanding parties

[Ian]

Removing the last party member from the party does not disband the party.  Party status shows a party of one.

Newhaven, Narrow Path
Also here: Ian2.
Obvious exits: north, south, east, west
[HP=26/MA=3]:par
The following people are in your travel party:
  Ian                           (Druid)      [M: 16%] [H: 61%]   - Frontrank
  Ian2                          (Bard)       [M:100%] [H: 85%]   - Frontrank
[HP=26/MA=3]:uninvite ian2
Ian2 has been removed from your followers.
[HP=26/MA=3]:par
The following people are in your travel party:
  Ian                           (Druid)      [M: 16%] [H: 61%]   - Frontrank
[HP=26/MA=3]:disband party
[HP=26/MA=3]:par
You are not in a party at the present time.
  Ian                           (Druid)      [M: 16%] [H: 61%]   - Frontrank

[Gardner Denver]

From Regmud:
[HP=560/560,KAI=56/56]: (Resting) par
You are not in a party at the present time.
  Gardner Denver                 (Mystic)     [K:100%] [H:100%] R - Midrank

So the only real difference is regmud shows you at midrank, GM shows you still in the frontrank.  Is this really a bug?