Slider Error

Hi!
I have a new website and it used to work well, but now I have a problem with the images of the galleries. They slide really fast, and after the second picture they jump back again to that one in the following order. 1 > 2 > 3..2> 4..2> 5…2.

I leave the link below,
https://monodemaqueta.com/?lang=en#!/?project=prueba9&lang=en

If one tries to slide the pictures, only two of them are shown instead of the whole album.

Can anyone help me? I don′t really know how to fix it as this problem has appeared without any change from my side.

Thank you very much.