template only shows 1st slide

So, i have the following problem, i downloaded a template in .potx form. Since i’m using Ubuntu and libreoffice i converted it to .otp and then proceded to edit it. I deleted all the slides except from one in the middle. I saved it as a template and then from a preexisting .odp file i tried to use the master slides to insert it, but it only shows the first slide of the original form of the .otp file. I have been trying now for close to 3 hours to make it show me the slide i want, but i cant. Any suggestions would be much appreciated.