When searching OCLC in ILLiad, you may have a limit set on your searches. The key OCLCILLAutoLimitType limits a query based upon the request type. For a loan, the type will be Book, for an article, the limit will be Serial Publications. When searching, you will see "1 Type selected" in the Type field. If you do not want the limit to be automatically applied, you need to do the following:
Now, you will not see a limit applied to your search.