I'm not even going to try reading through those regex. Why not make things simpler and do something more like:

use strict;
use warnings;

my %d;
while (<DATA>) {
    if (m/^Primary \(Reporting\) Cp:/) {
        ($d{'cp'}) = m/Cp: (\d+)/s;
        ($d{'set'}) = m/Set: (\d+)/s;
        ($d{'car'}) = m/Car: (\d+)/s;
        print "Cp:$d{'cp'} - Set:$d{'set'} - Car:$d{'car'}\n";
    }
    elsif (m/^Missing P:/) {
        ($d{'keep'}) = m/Keep: (\d+)/s;
        ($d{'phase'}) = m/Phase: (\w+)/s;
        ($d{'strength'}) = m/Strength: (\d+)/s;    
        print "Phase:$d{'phase'} - Strength:$d{'strength'}\n";
    }
    elsif (m/Secondary Sector Information:/) {
        print "Keep:$d{'keep'} - Phase:$d{'phase'} - Strength:$d{'stre
+ngth'}\n";
    }
    elsif (m/^Slot/) {
        ($d{'keep'}) = m/Keep: (\d+)/s;
        ($d{'offset'}) = m/Offset: (\w+)/s;
        ($d{'strength'}) = m/Strength: (\d+)/s;    
        print "Keep:$d{'keep'} - Pn_offset:$d{'phase'} - Strength:$d{'
+strength'}\n";
    }
    elsif (m/^={68}/) {
        %d = ();
        print '-'x30, "\n";
    }
}
print '-'x30, "\n";


__DATA__
====================================================================
Record: 9851329   Version:  2   Timestamp: Sat Feb 11 22:39:43 2006
Primary (Reporting) Cp: 113  Set: 2 Car: 1  Ref: yes  Event:   9922
Missing P:  Keep: 1  Phase: 0x2fdf  Strength: 24
Secondary Sector Information:
====================================================================
Record: 9851330   Version:  2   Timestamp: Sat Feb 11 22:39:43 2006
Primary (Reporting) Cp: 115  Set: 1 Car: 2  Ref: yes  Event:   9923
Missing P:  Keep: 1  Phase: 0x7d10  Strength: 31
Secondary Sector Information:
Slot 1:   Keep: 1   offset: 391   Strength: 27   Ref: no
Slot 2:   Keep: 1   offset: 325   Strength: 38   Ref: no
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