I recently purchased a domain name from namecheap.com and played around with it a little. I got it to do a URL redirect to Wikipedia.org.
A few hours later, I got a free hosting account with 000webhost.com and pointed my nameservers toward 000webhost. I built a sample website using 000webhost's tools.
It's been more than 24 hours, and when I try to access my website, I'd get Wikipedia some of the time and my sample site the rest of the time. From what I understand about DNS propagation, I should be getting one or the other.
What's going on? Is my understanding of DNS propagation incorrect?