After Import-spweb Site Theme is grayed out

Hi, 

i Need to move a sub site to a site collection and when done change the theme to look the same as all the other sites but ran into a issue.

i Create the destination team site and the theme's work with no issue.

Then i run my command after which the theme looks like this:

Why will this happen.

There was some errors saying it cant over write the Master Page. In total n think 10 errors but will have to load them later. Dont have access to log at the moment.

Anyone seen this behavior before?