Yeah, both the onstat and oncheck output show that the chunk is about half full (123/127 pages). Doesn't the oncheck -pe output show any tables following the output you posted? It's a very small chunk if the pagesize is 2K but an empty chunk can only contain some administrative pages to be dropped. If half the chunk was filled with administrative pages I wonder what a curious table was in it. But what about the indexes for the table you moved from this chunk? Check the table and it's (index)pages with oncheck -pt database:table.
BTW. Pls. paste your column outlined output inside [CODE] tags for readability, like
address number flags fchunk nchunks pgsize flags owner name
7885f7e8 1 0x40001 1 1 2048 N B informix rootdbs
address chunk/dbs offset size free bpages flags pathname
7885f948 1 1 0 128000 125207 PO-B /data/productiedbs/LINKS/rootdbs.00