Strange $poststoshow and static $count behaviour

I have a column which pulls in the 6 latest posts in a category (shown by a custom image/title), with a separating line between every two. Something weird is happening where the count is broken on the 4th post, and I can’t work out why. Here’s the code:

<?php
	$poststoshow = 2;
	if(is_single()) { $currentpost = get_the_ID(); }

	$posts = get_posts('numberposts='.$poststoshow.'&category=99'); ?>

	<?php
	foreach ($posts as $post) { 

		setup_postdata($post);
		static $count1 = 0; 

		if ($count1 == "2") {
			break;
		}
		else { ?>
			<div class="packshot">FIRST ROW POSTS</div>

			<?php
			//the_content();
			$count1++;
		}
	} ?><hr class="break" />

	<?php
	unset($posts);
	$posts = get_posts('numberposts='.$poststoshow.'&offset='.$count1.'&category=99');
	?>

	<?php
	foreach ($posts as $post) {

		setup_postdata($post);
		static $count2 = 2;
		if ($count2 == "4") {
			break;
		}
		else { ?>
			<div class="packshot">SECOND ROW POSTS</div>
			<?php
			//the_content();
			$count2++;
		}
	}
	?><hr class="break" />

	<?php
	unset($posts);
	$posts = get_posts('numberposts='.$poststoshow.'&offset='.$count2.'&category=99');
	?>

	<?php
	foreach ($posts as $post) {

		setup_postdata($post);
		static $count3 = 4;
		if ($count3 == "6") {
			break;
		}
		else { ?>
			<div class="packshot">THIRD ROW POSTS</div>
			<?php
			//the_content();
			$count3++;
		}
	}
	?>				<hr class="break" />

With apologies for layout – wasn’t sure how it’d render here.

So on the 4th post (on the second line), it simply isn’t pulled in. Then, no posts appear after that. If I change the third row code to

foreach ($posts as $post) {

		setup_postdata($post);
		static $count3 = 6;
		if ($count3 == "8") {
			break;
		}

Then posts are pulled in, but two are missing in the middle.

Changing the static $count pulls in different posts but no matter what I do, there always seems to be one missing. Compare this with the same code used to pull in rows of 3, elsewhere on the site:

<?php
$poststoshow = 3;
if(is_single()) { $currentpost = get_the_ID(); }

$posts = get_posts('numberposts='.$poststoshow.'&category=3'); ?>

<?php
foreach ($posts as $post) { 

	setup_postdata($post);
	static $count1 = 0; 

	if ($count1 == "3") {
		break;
	}
	else { ?>
		<div class="packshot">FIRST ROW POSTS</div>

		<?php
		//the_content();
		$count1++;
	}
} ?><hr class="break" />

<?php
unset($posts);
$posts = get_posts('numberposts='.$poststoshow.'&offset='.$count1.'&category=3');
?>

<?php
foreach ($posts as $post) {

	setup_postdata($post);
	static $count2 = 3;
	if ($count2 == "6") {
		break;
	}
	else { ?>
		<div class="packshot">SECOND ROW POSTS</div>
		<?php
		//the_content();
		$count2++;
	}
}
?><hr class="break" />

<?php
unset($posts);
$posts = get_posts('numberposts='.$poststoshow.'&offset='.$count2.'&category=3');
?>

<?php
foreach ($posts as $post) {

	setup_postdata($post);
	static $count3 = 6;
	if ($count3 == "9") {
		break;
	}
	else { ?>
		<div class="packshot">THIRD ROW POSTS</div>
		<?php
		//the_content();
		$count3++;
	}
}
?>

This works perfectly.

Any ideas? I must be doing something wrong somewhere along the line…