Hi Fabio,
Thanks for writing in!
Please avoid using negative margins as it could cause several layout issues on different browsers and devices, e.g. mobiles. Instead of that, change mts to mtn to remove the bottom margin from the timeline text (see: http://prntscr.com/8yhtwt). I’m also seeing a padding bottom added to the timeline content bands. You can also remove that and the spacing should be smaller in between the timeline elements without adding negative margins to them.
Thank you!