'Add to wishlist' doing weird things

[ioncap]

Hello dear people,

_{Joomla!: 3.4.8
VirtueMart: 3.0.13.6}

On this site i encountered something strange, when i look at a product, everything looks normal but as soon as i use the navigation just below the header-menu bar, things go from bad to worse. First i click on one of the neighbor buttons, now i see the product but it seems like the css of the "add to favorites/wishlist" suddenly isn't used anymore as it seems like a regular button (aa2.png / second screenshot).
When i click on the button (3th screenshot) i directly regret clicking that button as clearly everything is messed up. This only happens with the product neighbor link/button.

View attachments for screens.

Thanks for reading my post!

Kind regards,
-Ioncap

[jenkinhill]

Add to favourties/wishlist is not part of default VirtueMart and you are not using default VirtueMart templates there. What happens if you switch to Protostar?