Resolve the overlapped node issue

[maotian06]

When trying to plot the tree using the following script:

parent.only.tree <- SRCGrob(input.tree,
    scale2 = distance,
    yaxis2.label = 'Distance (# of SNV)',
    add.normal = TRUE);

I noticed overlapped nodes:

Also, I think when CP column is in the data.frame, the y.axis isn't working?