Selling BTC on Coinbase. Experiences?

First off, I would note that I've actually sold 2 Bitcoins in the past through Coinbase at $138 each. I think the very next day they were worth $200+. At the time, I was pretty annoyed, but in retrospect, that was a good sell considering my buy-in and everything that happened after.

They say it takes up to ~5 days for the payment to go into my Linked Bank Account, and it actually showed up a couple days early, which is no surprise considering what was going on at the time.

Anyway, last week I sold 3 Bitcoins on two separate occasions. First time was around $85 ea. Second time at $115 ea.

Supposedly one transaction will be finalized tomorrow and the other by Wednesday.

But considering how much Bitcoins have dropped in value since that time, I've grown a bit worried that somehow they will find a reason to "cancel" my sale and that is not out of paranoia, but rather, the fact that I've seen a few threads on this forum about that sort of thing on Coinbase.

So my question is:

Does anyone have experience selling on Coinbase at a greater price than it becomes a few days later and did Coinbase still pay you for the original transaction value?

There is no way I will accept the infamous "high risk" explanation since I HAVE history of selling Bitcoins through Coinbase, but it was more in their favor at the time.