In all things, this happens alot, phpmyadmin, my drupal installation, sometimes it happens and I cannot access my linode via ssh from the linux terminal.

I can often reload / retry and it will work, not always but if I try a few times it will usually work.

What is the cause of this? Any possible solutions?

The domain is hitogether.com

Your NS records at the parent servers are:

ns1.linode.com. [69.93.127.10] [TTL=172800] [US]
ns2.linode.com. [65.19.178.10] [TTL=172800] [US]
ns3.linode.com. [75.127.96.10] [TTL=172800] [US]
ns35.domaincontrol.com. [208.109.78.179] [TTL=172800] [US]
ns36.domaincontrol.com. [208.109.255.18] [TTL=172800] [US]
ns4.linode.com. [207.192.70.10] [TTL=172800] [US]

My guess is that you want to drop the domaincontrol.com nameservers from that list, which you would do through your registrar. They are not serving names for you, and that is making things unreliable.