As Doeleman pointed out, it takes time for the stuff to update and it’s not always on DH’s side for this matter.
What you’ve been seen is a classic example of “cached DNS”. Whenever you make a query for a domain your ISP’s DNS servers caches the DNS information for X period of time (TTL - TimeToLive). When you make DNS changes, it can take upto the full TTL for your ISP to update the cache for your domain (time depends on when it last did a DNS query for it).
TTL, but default, is set for 3 days, to minimize DNS traffic. Looks like it’s set for 21 days. 0.o
But it could change sooner depending on if the ISP actively clears it cache or not.
My suggestion: edit your host file until DNS fully convernts (nslookup www.boundmuse.com via the commandline)