Hi, I was thinking about it, and I found a way to use images from other landing pages. It is not very efficient but it solves my problems at the moment.
When I am building a new landing page and I need an image not included in its template, I follow the following steps:
1.Create a new landing in whose template we can find the desired image.
2.In this new landing page, I click on the desired image and save it to my "own" image library (saved in my hard disk).
3.Open the first landing page that I am building and then I am able to upload the desired image.
The good point is that once you do it with an image, you can always use it in new landing pages.
Anyway Unbounce should change it quickly as well as implementing the ability to track different conversions separately.
I hope you find it useful!!!