There is no problem, an established Motia bush will occasionally throw a few long branches, these runners on touching ground at a distance sprout roots and another plant is formed and if they find a support they will climb up like a vine.
Standard bush,
Bush with runners climbing up in the Allamanda hedge.
![Image](https://lh3.googleusercontent.com/-DoTTr9fmye8/U32HzWLMWHI/AAAAAAAAIWY/RZP4bOsb5eI/s640/DSC_0668.JPG)
I hope it clears your confusion.
Arif