First off, it sounds like you're using either AdSonar or Pulse360 as your traffic source. It's been my experience that the conversion rates coming from this traffic can fluctuate wildly.
Basically, you've pushed 70ish clicks at your LP, assuming a decent CTR on your landing page (I'll go w/ 30% for this example) so you've managed to get around 20 clicks to the offer(s) you're promoting. This isn't even close to being statistically relevant. If losing 80 bucks scares you, you should find someplace where you can get a better avg CPC while you're testing so you can generate better sample sizes. Obviously the traffic quality has to be decent, otherwise the testing is meaningless.
That way, when it's time to scale you'll have had the opportunity to test offers, optimize copy, CTR etc and will be able to support a higher CPC with a little more confidence.
My 2 Cents.