If you are using CloudFlare, especially their Rocket Loader javascript loader it is likely that you are having problems with your Post Affiliate click or sale tracking javascripts.
Fortunately there is a way to make sure that your tracking scripts aren't processed by Rocket Loader. According to CloudFlare's support documentation it is enough to add data-cfasync="false" attribute to your javascripts which should be ignored.
Here is an example of a click tracking code with this parameter added on all required positions:
<script data-cfasync="false" type="text/javascript">
document.write(decodeURI("%3Cscript data-cfasync='false' id='pap_x2s6df8d' src='" + (("https:" == document.location.protocol) ? "https://" : "https://") +
"SOMETHING.postaffiliatepro.com/scripts/wwj1wof2z' type='text/javascript'%3E%3C/script%3E"));
</script>
<script data-cfasync="false" type="text/javascript">
PostAffTracker.setAccountId('default1');
try {
PostAffTracker.track();
} catch (err) { }
</script>
Make sure you add the attribute on all 3 highlighted positions.