Acer Conundrum

Anybody have any thoughts on how this could happen?

There is a spur coming off the stem which has the variegated foliage. I don`t quite understand how this spur could have such totally differant foliage.:D

 

Photos are tiny, Dai - can't see what you're trying to explain. Any chance of a adding some larger pics?

 

That`s photobucket for you, will have a looksee.

 

Try that.

 

Is that something growing from the rootstock?
Pics are difficult to decipher )
It might also be a case of two different scions having been grafted onto the same rootstock. I have heard of experiments in that direction