Adding dropdown menu to my existing navigation

None of those things are happening on the original demo I gave you but you can over-ride some of that behaviour with the following code added at the end of the css.

@media screen and (max-width: 599px) {
  .js .navigation_container.rm-initiated {
    display: block;
  }

  .navigation_container li li {
    float: none;
  }
}

with the hamburger dropdown links the current link is not displayed on my iphone…

It’s there on my phone in the link at post#50.

You still seem to have scss linked to it as well as they are showing in devtools. Remove this line from the responsivemenu css.

/*# sourceMappingURL=responsivemenu.css.map */

Then I suggest you rename the css files just to avoid caching issues.

When you click the toggle device toolbar you often have to click refresh on the page to make sure it’s working. The toggle device toolbar is only an approximation anyway as it can’t actually emulate a real device.