I've created my app the normal way with cmd in ext 5 and what I had done was simply put my css files (in the index.html file) and when I would run sencha app build my styles word override the ones in ext (that is things like the body tag).

Now, I've recreated my ext project with cmd again from scratch, copied in my app.js and app folder and it works but it seems that my app flashes my body tag but then it goes away and the standard css takes over.

That is, in my in my index.html I have the lines:

<link href="/Content/Styles/scrum-style.css" rel="stylesheet" type="text/css"/>
<link href="/Content/Styles/SessionSchedule.css" rel="stylesheet" type="text/css"/>
***Added Note:
After reading, I've copied the css from the two files into /sass/etc/all.scss and that pushed the css into the top of the generated file but it still seems to be overridden.

changed theme back to original gray and that solved it.