Pretty sure LIDGE, Pure Malt, Chergui fall foul of the rules on splits, as they are too cheap to split.
Yup, these are the minimum price of bottles that can be split on the boards (see the policy thread at the top of the splits sub-forum):
REVISION 1/23/2012:
30 ml. bottle must cost $90 or more, minimum split is 5 ml.
50 ml. bottle must cost $125 or more, minimum split is 10 ml.
60 ml. bottle must cost $150 or more, minimum split is 10 ml.
75 ml. bottle must cost $165 or more, minimum split is 15 ml.
100 ml. bottle must cost $200 or more, minimum split is 20 ml.
125 ml. bottle must cost $225 or more, minimum split is 25 ml.
150 ml. bottles must cost $250 or more, minimum split is 30 ml.
250+ ml. bottles must cost $350 or more, minimum split is 50 ml.