whats funny is when I look at the results of the queries I'm running, we have 12 blocks that contain the same recipient address (as another block) for the mined coins.  To verify that I'm pulling data correct, I used blockexplorer, to verify my results.

 An example of this issue can be found by looking at the blocks below:

http://blockexplorer.com/b/70459
http://blockexplorer.com/b/70460

both were mined by the same recipient 15w6iQpfmsKwHswaUoWNWhyjAftrU1b3yB

I have 5 other examples that contain this same issue.

does someone get a new address after they make a transaction, and any new coins mined will have the newly created address?

the data I'm looking at doesn't support your statement of "new address for each mined coin", since I have 12 blocks that have the same recipient address as another block..

Please help me to understand what is going on here.  Is there documentation that would describe this?

Thanks!

Mainline Bitcoin will never create two blocks with the same address. It's dangerous to do so, in fact, as you might create duplicate transactions. It is technically possible, though, if you modified your client to do so.

If you've generated two blocks that were sent to the same address and you're using mainline Bitcoin, then this is a bug.

It's not a problem unless you force Bitcoin to use addresses more than once. Modified clients can add arbitrary data to the generation's scriptSig in order to get more uniqueness.