When dealing with OPPP (One Processor Per Partition) style processors, it is possible to have more than one CHPID (from different logical processors) correspond to the same physical channel path number. That physical channel path may be connected to something. In that case, export will only produce one LOGLINK record for that path. Consider a case in which two CHPIDs map to the same path. The single, exported LOGLINK record will contain the CHPID source identification of one of the two CHPIDs. No other LOGLINK record is required because the connectivity of the second CHPID can be inferred from the connectivity of the first, since the physical manifestation as a path is shared.
If you are creating files for import you should use the same philosophy as that used by export, and avoid entering more than one LOGLINK record per path.
The same applies to CONNECT records, described below. That is, for each path, there should be only one CONNECT record that lists a CHPID on that path as its source.