All I see are E's and X's(and alot of em!) whats it all mean?
If you are using the NEC the "E's" & "x's" mean nothing by themselves. The marking must be "AEx" to indicate the product meets US domestic standards. See Section 505.9(C)(2).
That said, the definitions for for "d" and "e" type protection are in Section 505.2.
From the OP:
1. The single letter designation means the product only offers the identified "type of protection"
2&3. Multiple letters means the product offers each type of protection identified. They are usually listed in alphabetical order, but it is not a requirement.
The overall Zone marking requirements are also in Section 505.9(C)(2).