The current behavior of timeseries.pyccd is to trim chip arrays to match the intersecting set of all chip dates. This means inconsistent results may be observed from repeated calls to this function, depending on the back end storage system.
Version 1.0 will implement a check function instead of trim, which will raise an Exception if the chip arrays are not symmetric by date. This was not able to be released for v0.5.1 as it is awaiting modifications to lcmap's ingest routines.