[solved] IP-blocking: Huge discrepancy between Original and Master

[Bob.Dig]

I tried to add FireHOL to pfBlocker and I see the following.

[ firehollevel1_v4 ]		 Reload [ 08/14/23 11:06:40 ] . completed ..
  ------------------------------
  Original Master     Final     
  ------------------------------
  2011     706        706         [ Pass ] 
  -----------------------------------------------------------------

[ firehollevel2_v4 ]		 Reload [ 08/14/23 11:06:41 ] . completed ..
  ------------------------------
  Original Master     Final     
  ------------------------------
  14204    10         10          [ Pass ] 
  -----------------------------------------------------------------

From 14204 IPs only 10 make it through for "firehollevel2". Could somebody please explain that to me?
(Edit: Technically, I could be blocking those IPs already in other list? How can I be sure that this is the case.)

pfSense Table Stats
-------------------
table-entries hard limit  9000000
Table Usage Count         489074

 UPDATE PROCESS ENDED [ 08/14/23 11:06:51 ]

This vm has 8 GB RAM.

23.05.1-RELEASE
pfBlockerNG-devel 3.2.0_5

[Bob.Dig]

Because no one answered I guess now that it must be de-duplication. So I mark this solved.