Hello and thank you for the advice.
As you can tell I'm a complete novice.
I bought the plant at the end of last summer from a local supermarket/grocery store and it has grown well. I live in Scotland so wasn't sure how it would do in winter but it's growth just slowed down.
At the start of spring the trunk looked like it was thickening out, so I repotted.
As I said I'm a novice and just used the only compost I had which was GroPlus Seaweed Compost and I mixed in some coco coir. I've just checked, and it says that the compost is "packed with micronutrients and trace elements including phosphorus, calcium, magnesium, potassium, and growth hormones (such as auxins and cytokinins)".
So maybe I've overdosed it on auxin.
I haven't done anything to the stem tip, but I have noticed the last few leaves haven't had a sheath and the last leaf was a much lighter green. I presume it's putting all its energy into growing the new stems and leaves.
I checked the plant this morning and another four nodes are starting to grow, and I think by tomorrow there should be two leaves on a couple of the lower new little branches so I will take your advice and pinch them.
Thank you again.