Looking at booking RDU to MIA to AXA for next spring break- the outbound dates literally went on sale today- so no hurry, but I have a couple of questions.

1. Pricing is dynamic in miles, how likely are those prices to come down? Right now they are fairly high (60k points or so one way) - weekday prices are much lower (20k). 120k round trip is lot more than I want to pay for a trip to the Caribbean in economy.
2. If I go ahead and buy now - and prices drop, I can get a 100% refund of miles and fees correct? (edit - verified this on AA.com)
3. If I do go ahead and buy, is that likely to mess up the algorithm that does dynamic prices and contribute in a meaningful way to prices in the future?


Thanks all