Sandee explored this topic in this article.
https://creativepro.com/adding-hunspell-dictionaries-indesign.php
I assume it is very similar for CC 2015.

We talk about this a little bit in this month’s podcast. See links to scripts on this page:

Podcast 222

You mean there is extra space between the paragraphs? Are you selecting the whole paragraph (including the final invisible paragraph return character at the end of the paragraph) when you check the leading value? Sometimes a single character gets the wrong leading.

Also, of course, check for space before or space after settings on the paragraph.

You might have to adjust that in Acrobat. I can’t recall. Interactive PDF is finicky. Note that it almost certainly won’t work on an iPad.

When you place the EPS or PDF, do you need to edit it in Illustrator? Maybe that is the problem.

EPS is an old format, and most people use PDF now: https://creativepro.com/tiff-vs-psd-vs-eps-vs-pdf-vs.php

No, you definitely do not need to do find/change to get ligatures in InDesign, but you do need the right fonts. If the font has the right intelligence built in (and most OpenType fonts do), then InDesign does all the swapping on the fly.

It sounds like you’re looking for the Discretionary Ligatures feature, which will replace things like “ct”. You can find that in the OpenType menu, inside the Control panel menu (or the Character panel menu).

See: https://creativepro.com/typetalk-standard-vs-discretionary-ligatures/