There is multiworld support. Just start claiming land in other world. Unless you want to be in a different faction in the nether.
There does not seem to be any memory leak here. Running MCMMO 1.0.34 MC 1.7.3(latest RB) +other plugins
That seems to be a bug when you have 0 items or 0 price. Under buy or sell. ex: [282] 1 for 0 Will throw that error as well as take the item from...
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