Right now, the order of shelved projects seems to be random:

~ config backup (archived on Tue, 18 Jan 2011 13:47:40 +0100)
TRUNK_MSEDI (archived on Wed, 19 Jan 2011 11:45:22 +0100)
create-db-schemas (archived on Thu, 13 Jan 2011 17:45:06 +0100)
testbase (archived on Fri, 14 Jan 2011 16:00:20 +0100)
~ base job (archived on Fri, 14 Jan 2011 16:00:48 +0100)
testjob (archived on Fri, 14 Jan 2011 16:00:33 +0100)
SWARM_CONFIG (archived on Wed, 12 Jan 2011 15:40:24 +0100)
test2 (archived on Wed, 12 Jan 2011 15:41:31 +0100)

Are you using a HashMap or HashSet ? If so, consider at least using a LinkedHashMap or LinkedHashSet...