Bulbophyllum auratum

My Bulbophyllum auratum decided to throw out seven flower stalks recently.  Six of them carries pink flower while one stalk of flower is yellow in color.  I must have placed two different plants together on the same piece of tree bark.  A few months ago, i was searching for the yellow auratum cos i remember having one.  But i just couldn't find it.  Now i know where it is.