It was just that we happened to have got our pricing right：不是强调句。

这是非正式文体，that 相当于because：It was just because we happened to have got our pricing right, so... 

It 是代词，指代前文说的事情。意思是：那是因为我们碰巧取得了定价权，所以...

It was just that we happened to have got our pricing right, so when we changed that, it all started falling apart.

【翻译】那是因为我们碰巧取得了定价权，所以在我们改变了那个价格（或：情况）时，一切都开始玩完了。

【说明】没有具体语境，仅按字面翻译。

【注意】that 引导的从句作表语时，可以理解为“原因”，这时that 相当于because。例如：

It is not that I don't want to, but that I can't. 不是因为我不想，而是因为我不能够这么做。

It is just that it is highly unpredictable. 只是因为它很难预测。

If I find fault, it is not that I am angry; it is that I want you to improve.  如果我挑剔你，那不是因为我生气而是因为我要你进步。

It is not that we do not admire them as they deserve. 这并非因为我们不愿恰如其分地加以赞赏。