This posting is older than 6 months and can contain outdated information.
Although the Manta-TR1 and the receiver you've bought share the same USB Vendor and Product ID, they are actually different. The Manta TR-1 is based on the model IR606 and you most likely bought the model IR606/Q (you usually can find the model number on the bottom side of the device).
Like other Formosa21 receivers (f.ex. the one sold in the Trust RC-2400 package), the IR606/Q doesn't seem to be capable of handling the long lead-in signal that's part of every Apple Remote IR code. Due to this, the receiver only sends incomplete/corrupt IR signal information over USB for Apple Remote IR codes.
For applications like Remote Buddy that use a full-fledged decoder for the Apple Remote IR codes to utilize all information contained in these IR codes, this effectively hinders recognition of the IR code.
I've now also added a notice about this to the Remote Buddy Hardware page.
If you're looking for an eHome receiver in Germany that's compatible with RB - you can find one on Amazon.de following the shopping link on the RB hardware page (I personally bought one of these only a few weeks ago).
Best regards,
Felix Schwarz