The yellowing leaves, if you notice, are the bottom leaves, or the old ones. They used up their nutrients to give life to the clone by helping to produce roots. You can also see the end of the leaves cut across by scissors, which is often done during to cloning process. You should carefully cut those off, as long as you can see new growth elsewhere. Those that are like that are lagging behind because they are trying to 'repair' those leaves rather than produce new growth.