This confuses me what do these mean for cnames?

3600
14400

"(sē-nām) Short for canonical name, also referred to as a CNAME record, a record in a DNS database that indicates the true, or canonical, host name of a computer that its aliases are associated with. A computer hosting a Web site must have an IP address in order to be connected to the World Wide Web. The DNS resolves the computer’s domain name to its IP address, but sometimes more than one domain name resolves to the same IP address, and this is where the CNAME is useful. A machine can have an unlimited number of CNAME aliases, but a separate CNAME record must be in the database for each alias."

Source

I mean what is the difference of the numbers assigned.

Oh then, I don't know... I'm sure Ross would know.

That probably refers to the TTL (Time to Live). That is the number of seconds a DNS server should keep your record information cached for. When you're planning to make changes to your DNS entries, it can be a good idea to set it to something low a day or two before hand (eg. 3600, 1 Hour), this helps any changes you make propogate quicker. For normal usage, you'd use something higher as this lowers the load put on your name servers (and I believe it can affect users loading times).

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