How can you have sucker branches above the graph on a climbing rose bush? Is it something else?

These branches are obviously different and grow very fast. Everything I found on the web says suckers grow from the root below any graph. Some of the suckers have sprouted down there but I just removed 5 of them that sprouted near the top of the bush?
How can you have sucker branches above the graph on a climbing rose bush? Is it something else?
They aren't suckers then. Suckers come up from the ground. Are you certain that they are not simply branches on your climber. Climbers can average 8ft in one season so maybe you are mistaking the rapid growth of a branch. You can't have a sucker above graft union.
Reply:Could be a branch sport . That's where a lot of new varieties come from. Are you sure it's from above the graft ? Let it go %26amp; see what it is . Btw, the graft should be 4" deep . Along with protecting it from winter, it'll prevent most suckers from being generated .