If so, please enable Extended Logging for MCE remotes in configuration.exe, start MP, press those two non-working remote buttons in MP, close it and post your mediaportal.log. Do nothing else in MediaPortal.
This was a bug in earlier SVN's and already fixed in a later SVN, but maybe you have installed an earlier SVN with the mapping bug and have customized the mapping at that time. So..make sure you use the default mapping.
Just a litle doubt: is there any support for the IR Blaster function of the Hauppauge 150MCE? I know I can use it with the MCE Replacement function, but it will work with the correction for the rest of the buttons?
Perhaps it would be interesting to include the support for a standard Microsoft IR Blaster too....