Hi. Could you please either go through and provide attribution (generally a statement that the content was originally on this page, with a link back to the original article, or delete the pages on this wiki that were copied from the other one? The contributor who added them does not appear to be around (and can't delete them anyhow) but as you are the founder here, you can do so.
Also, if you are interested you could discuss merging this wiki with the other one to pool your resources. If both wikis agree then somebody can send a request to Special:Contact.