Weird allocation record for 192.114.0.0

I was doing some processing on the address allocation records published on ripe's ftp websites:
ftp://ftp.ripe.net/pub/stats/ripencc

And I noticed that for some records the db is bizarre.

For instance, the address block starting from 192.114.0.0 appeared as
as ripencc|IL|ipv4|192.114.0.0|327680|20010306|assigned
on allocation files before 03/15/2005.
Then it disappeared for several years, and popped out on 06/27/2009 as
ripencc|EU|ipv4|192.114.0.0|327680|19930901|assigned
Note that the country code and allocation date has been changed.
It doesn't make sense if the address block was returned because allocation date(19930901)
on 06/27/2009 was even before the previous record(20010306).

And on 07/31/2009, it shrunk into a smaller block:
ripencc|EU|ipv4|192.114.0.0|21504|19930901|assigned
Does this mean part of it was returned?

Any answer regarding how the allocation files are produced or
whether the cases mentioned above are errors are greatly appreciated.
Thanks in advance,

Lucas
  



Lucas(Jiangzhe) Wang