Q.Advice Re Bottle Bush Plant
I purchased the above plant last year – unfortunately I can’t remember from where. To my delight a lovely fuschia coloured bushy flower has appeared at the end of one stem and there looks to be another nodule about to flower on another stem, However, on seven other stems – bright yellow flowers are appearing with 5 petals and a large stamen. I’ve searched loads of gardening sites to see if anyone describes this, but can’t find any mention. On one of the flowers the petals have now been blown off and there is a nodule left behind – so I don’t know whether to just leave it and see if it transforms into something amazing! Sorry for landing you with my query, but you are the first site I have visited that invites inquiries. Any help would be much appreciated.

Certified GKH Gardening Expert
There shouldn't be two types of flowers. Have you checked the stems to see if there is a second plant intertwined with the bottlebrush? It's possible, too, that a weed seed blew in and grew. Another possibility is a sport, or mutation. Here is more:
https://www.gardeningknowhow.com/garden-how-to/info/plant-sport-mutations.htm