I have a problem with matching a member of an array with a member of another array, the regex match statements in the following code is providing answers i am not clear about. Any suggestions.

#!/usr/bin/perl -w
use strict;
#Matching a member of texlines with a member of update*
#Last example, Fourth, is what needs to be done
my @updateloc = ("LakeOsouth", "LakeOeast", "LakeO2", "LakeO");
my @updateloc1 = ("LakeOsouth/stuf", "LakeOeast/stuf", "LakeO2/stuf", 
+"LakeO/stuf");
my @texlines = ("LakeOsouth", "LakeOeast", "LakeO2", "LakeO");
# Works fine
print "Zero\n";
foreach my $update (@updateloc){
    for my $lin (@texlines){
        if ($lin =~ /$update\b/){
            if ($update =~ /$lin/) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
}    }    }    }
# Getting 3 bad ones
print "First\n";
foreach my $update (@updateloc){
    for my $lin (@texlines){
        if ($lin =~ /$update/){
            if ($update =~ /$lin/) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
}    }    }    }
# Getting 2 bad ones; the digit on end of $update iso a char is ok?
print "Second\n";
foreach my $update (@updateloc){
    for my $lin (@texlines){
        if ($lin =~ /$update/g){
            if ($update =~ /$lin/g) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
}    }    }    }
# No good, anything to do with previous matches (the /g)?
print "Third\n";
foreach my $update (@updateloc){
    for my $lin (@texlines){
        if ($lin =~ /$update/g){
            if ($update =~ /$lin/g) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
}    }    }    }
# Back to number Zero, so Third is influenced by Second?
print "Third and a half\n";
foreach my $update (@updateloc){
    for my $lin (@texlines){
        if ($lin =~ /$update/){
            if ($update =~ /$lin/) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
}    }    }    }
#Finally the problem
# This is what i need: match 1 reverse, doesn't happen
print "Fourth\n";
foreach my $update (@updateloc1){
    for my $lin (@texlines){
        if ($lin =~ /$update/g){
            if ($update =~ /$lin/g) {
                print "match  1 reverse $lin $update\n";
            }else{
                print "bad match $update $lin\n";
            }
        }else{
            if ($update =~ /$lin/g) {
                print "\tmatch 2 reverse $lin $update\n";
            }else{
                print "\tno match $update $lin\n";
}    }    }    }
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