Go go GLBSE funkyness. From #bitcoin-assets:
[18:00] <@assbot> [GLBSE] [GSDPT] 1 @ 0.0032 BTC
...
[18:03] <@assbot> [GLBSE] [GSDPT] 1 @ 0.0032 BTC
[18:04] <@assbot> [GLBSE] [GSDPT] 300 @ 0.0032 = 0.96 BTC
...
[18:04] <@assbot> [GLBSE] [GSDPT] 1000 @ 0.0032 = 3.2 BTC
[18:05] <@assbot> [GLBSE] [GSDPT] 999 @ 0.0032 = 3.1968 BTC
...
[18:05] <@assbot> [GLBSE] [GSDPT] 20 @ 0.0032 = 0.064 BTC
Then the last trade listed on GLBSE is
47679@0.0032, so that trade (which didn't print on IRC) got the rest of the shares.

Damn. The 999 was only a test buy to make sure GLBSE was working. I wanted more!