Mobile option conflicts with other modules

<script src="/access2/templates/wisten/js/jquery-1.10.2.min.js"

this is what need to be fixed. look with your template developer, this is not correct for joomla 3. It shall use the API

Hm... template developer doesn't really respond to emails... VERY poor support.

Maybe something I can do to work around him?
Would it help to "call" a later version of .js like jquery-1.11.2.min.js?

you have purchased a template for joomla 3 that is not correctly coded to work with this version from someone who does not help you to solve this problem ?
wahou ...

this is not the correct solution but you can try the plugin "jquery easy" (which should not be used under joomla3 !!)

Ok, this answer was actually helpful, although not really solving the problem, I understand it's not YOUR problem to solve.

Many many thanks for helping me out, appreciate it a lot!