Extracting Embedded OLE Object

We use the C API to open and NSFs and access the Notes Documents and their content.

We have recently found an issue where embedded OLE objects (Excel for example) when extracted have slightly different content exach time (5 bytes). It does not alter the actual content of the extracted file, but does ensure it to be unique so the file never hashes the same with each extraction.

Is this a Notes implementation issue or is it a lower-level OLE issue?

Any ideas?