My Passionflower cuttings are flowering

I made some cuttings from a passionflower growing at our tube station. I made sure to remove surplus leaves and buds
Three out of six cuttings made it. One is just still alive the other two are growing.
Last week one of the cuttings grew a flowerbud, flowered for one day. This morning the bud droped off.
The other cutting has shown a lot more foliage growth but now has also grown a flowerbud. Should I cut the buds off?

 

I would, to encourage the plants to use their energy into making roots and leaves.

 

Great. That's what I thought. It's a hard ob but someone has to do it.