People on the Steam forum seem understandably confused about the D:OS EE Collector's Edition.
For one, your Steam store page (using the U.S. as an example) lists D:OS EE for $39 and D:OS EE CE for $69. However, beyond the price being different it doesn't provide any details about what's included in either product. I can't imagine anyone giving you $69 for the CE without knowing what additional goodies are in it first. Since this is costing you potential sales, you probably want to get that updated sooner rather than later.
Second, owners of the D:OS CE are asking if they're getting the D:OS EE *Collector's Edition" for free. Right now they only appear to be getting the standard D:OS EE (non-CE) showing up in their library (and not the D:OS EE CE instead).
Finally, people are asking if there's a way to upgrade from the D:OS EE to the D:OS EE CE, as right now there is no upgrade path available on Steam.
My brain hurts from all the abbreviations.