It's very likely that you've overwritten one.
Here's what they should look like...
<table border=1><tr><td>PBP folder
Code:
'****************************************************************
'*  18F4550.BAL                                                 *
'*                                                              *
'*  By        : Leonard Zerman, Jeff Schmoyer                   *
'*  Notice    : Copyright (c) 2007 microEngineering Labs, Inc.  *
'*              All Rights Reserved                             *
'*  Date      : 06/29/07                                        *
'*  Version   : 2.50                                            *
'*  Notes     : Long                                            *
'****************************************************************

BANKA   $0000, $005F
BANK0   $0060, $00FF
BANK1   $0100, $01FF
BANK2   $0200, $02FF
BANK3   $0300, $03FF
BANK4   $0400, $04FF
BANK5   $0500, $05FF
BANK6   $0600, $06FF
BANK7   $0700, $07FF
'EEPROM  $F00000, $F000FF
LIBRARY "PBPPI18L"
'LIBRARY "PBPUS18L"

        include "PIC18EXT.BAS"

PORTL   VAR     PORTB
PORTH   VAR     PORTC
TRISL   VAR     TRISB
TRISH   VAR     TRISC

        include "PBPPI18L.RAM"

'*-----------------------* EOF 18F4550.BAL *--------------------*
</td><td>USB18 folder
Code:
'****************************************************************
'*  18F4550.BAL                                                 *
'*                                                              *
'*  By        : Leonard Zerman, Jeff Schmoyer                   *
'*  Notice    : Copyright (c) 2007 microEngineering Labs, Inc.  *
'*              All Rights Reserved                             *
'*  Date      : 05/09/07                                        *
'*  Version   : 2.50                                            *
'*  Notes     :                                                 *
'****************************************************************

BANKA   $0000, $005F
BANK0   $0060, $00FF
BANK1   $0100, $01FF
BANK2   $0200, $02FF
BANK3   $0300, $03FF
'BANK4   $0400, $04FF
'BANK5   $0500, $05FF
'BANK6   $0600, $06FF
'BANK7   $0700, $07FF
'EEPROM  $F00000, $F000FF
'LIBRARY "PBPPI18L"
LIBRARY "PBPUS18L"

        include "PIC18EXT.BAS"

PORTL   VAR     PORTB
PORTH   VAR     PORTC
TRISL   VAR     TRISB
TRISH   VAR     TRISC

        include "PBPPI18L.RAM"

'*-----------------------* EOF 18F4550.BAL *--------------------*
</td></tr></table>
If they aren't equal, which one is more valid, or 100% valid?
They are both 100% valid.
One is used for USB, the other is used for NON USB programs.
<br>