Game Mechanics: One Hundred Blows duration seems strange

[Splorf22]

I'm not quite sure what to think of these logs.

[Sun Dec 22 15:24:36 2013] Lava beetle begins to spin from one hundred blows.
[Sun Dec 22 15:24:36 2013] You crush lava beetle for 95 points of damage.
[Sun Dec 22 15:24:36 2013] You try to crush lava beetle, but miss!
[Sun Dec 22 15:24:36 2013] Auto attack is off.
[Sun Dec 22 15:24:48 2013] Lava beetle tries to bite YOU, but misses!
[Sun Dec 22 15:24:48 2013] Lava beetle bites YOU for 53 points of damage.
[Sun Dec 22 15:24:48 2013] Lava beetle tries to bash YOU, but YOU dodge!
[Sun Dec 22 15:24:51 2013] Lava beetle tries to bite YOU, but misses!
[Sun Dec 22 15:24:53 2013] Your One Hundred Blows spell has worn off.

[Sun Dec 22 15:24:59 2013] Lava beetle begins to spin from one hundred blows.
[Sun Dec 22 15:24:59 2013] You crush lava beetle for 38 points of damage.
[Sun Dec 22 15:25:00 2013] Auto attack is off.
[Sun Dec 22 15:25:05 2013] Lava beetle bites YOU for 20 points of damage.
[Sun Dec 22 15:25:05 2013] Lava beetle bites YOU for 86 points of damage.
[Sun Dec 22 15:25:05 2013] Lava beetle tries to bash YOU, but misses!
[Sun Dec 22 15:25:05 2013] Shamikaze begins to cast a spell.
[Sun Dec 22 15:25:08 2013] Lava beetle bites YOU for 57 points of damage.
[Sun Dec 22 15:25:08 2013] Lava beetle bites YOU for 28 points of damage.
[Sun Dec 22 15:25:10 2013] You crush lava beetle for 42 points of damage.
[Sun Dec 22 15:25:10 2013] Lava beetle tries to bite YOU, but YOU riposte!
[Sun Dec 22 15:25:11 2013] Your One Hundred Blows spell has worn off.