I would like to understand the following, 

In DS Visualizer, the amino acid ARG 263 is shown as unfavorable donor-donor interaction (Donor-Donor Clash), whereas in PLIP server it is represented as hydrogen bond interaction for the same amino acid. May I know why there is a difference. ? 

Also, I would like to align the residue labels within the ball or disc, or plate (In DS Visualizer), How to do it? 

Enclosing the image for reference.