Does that explain it?

Yes, it makes sense now, after playing with this. You say refreshed, I say reset/reinitialized.

#!/usr/bin/perl --
use strict; use warnings;
use Tk;

my %in = (
    a => 4,    # HEAVY
    b => 4, 
    c => 4, 
    d => 24, 
    e => 24, 
    f => 24, 
    g => 1000, 
    h => 150, 
    i => 150, 
    j => 150, 
    k => 600,  # hot air baloon
);

my @ev11 = map {[$_, $in{$_}, 0, $in{$_}, undef ]} sort keys %in;

my $mw = tkinit;
my $fr = $mw->Frame( -background => 'red', )->pack;#( qw/ -expand x -f
+ill x -anchor n -side top / );
$fr->Label( -text => 'NUMHITS:')->grid( qw/ -stick ew -row 1 -column 1
+ /);
$fr->Label( -text => 'letter(interval):')->grid( qw/ -stick ew -row 2 
+-column 1 /);
$fr->Label( -text => 'time remaining:')->grid( qw/ -stick ew -row 3 -c
+olumn 1 /);
my %butt;
{
#~ $one->[0] letter
#~ $one->[1] interval
#~ $one->[2] number hits
#~ $one->[3] time remaining
#~ $one->[4] button
    use constant INTERVAL => 1;
    use constant NUMHITS => 2;
    use constant TIMEREM => 3;
    use constant BUTTON => 4;
    my $col = 2;
    for my $one ( @ev11 ){
        $fr->Label(
             -relief      => 'groove',
            -text => $one->[0] . ' (' . $one->[1] . ')',
        )->grid(
            qw/ -sticky ew -row 2 /,
            -column => $col
        );
        $fr->Label(
             -relief      => 'groove',
            -textvariable => \$one->[NUMHITS]
        )->grid(
            qw/ -sticky ew -row 1 /,
            -column => $col
        );
        $one->[BUTTON] = $fr->Button(
            -command => \&Fooo,
            -textvariable => \$one->[TIMEREM],
        )->grid(
            qw/ -sticky ew -row 3 /,
            -column => $col
        );
        $col++;
        $butt{ $one->[BUTTON] } = $one;
    }
}
my $tx = $mw->ROText->pack(qw/ -expand 1 -fill both -anchor n -side to
+p / );
MainLoop;
sub Fooo {
    my $b = $Tk::event->W;
    $tx->insert(
        'end',
        sprintf '%s(%d/%d), ', 
            $butt{ $b }->[0] ,
            $butt{ $b }->[NUMHITS] ,
            $butt{ $b }->[TIMEREM],
    );
    for my $one ( @ev11 ){
        $one->[TIMEREM]--;
        $one->[BUTTON]->configure( qw/ -state normal /);
    }
    $butt{ $b }->[NUMHITS]++;
    $butt{ $b }->[TIMEREM] = $butt{ $b }->[INTERVAL];
    $b->configure( qw/ -state disabled /) ;
}
__END__
[download]

a(0/4), b(0/3), c(0/2), a(1/2), b(1/2), c(1/2), d(0/18), a(2/1), b(2/1), c(2/1), e(0/14), a(3/1), b(3/1), c(3/1), f(0/10), a(4/1), b(4/1), c(4/1),

Looks like you could have four 4-second repeaters max without dropping one ( or five 4 second repeaters and nothing else).