First of all , I'm sorry, I've been working for a lot of hours and I didn't understand you before...
but now I thing I got it...
But the file jquery.mobile.structure-.1.2.1.min.css is not in the zip I've downloaded from themroller, I've founded it in the jqueryMobile 1.2.1 folder...
It looks better but It's still looking wrong, here is my theme from themRoller:
And here the capture of my screen:
I also tried to avoid the other .css and theme are not the problem.
My head now, thx for all:
<head>
<title>Rosteleria</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="theme/myTheme.min.css" />
<link href="css/estilo.css" type="text/css" rel="stylesheet" />
<link href="css/styles.css" type="text/css" rel="stylesheet" />
<!--<link href="jquery.mobile/jquery.mobile-1.2.1.min.css" type="text/css" rel="stylesheet"/>-->
<link rel="stylesheet" href="jquery.mobile/jquery.mobile.structure-1.2.1.min.css" />
<link rel="stylesheet" type="text/css" href="css/jqm-datebox.min.css" />
<script src="jquery.mobile/jquery-1.8.3.js"></script>
<script src="jquery.mobile/jquery.mobile-1.2.1.min.js"></script>
<script type="text/javascript" charset="utf-8" src="js/cordova.js"></script>
<script type="text/javascript"src="http://maps.googleapis.com/maps/api/js?sensor=true"></script>
<script type="text/javascript" src="js/jqm-datebox.core.min.js"></script>
<script type="text/javascript" src="js/jqm-datebox.mode.calbox.min.js"></script>
<script type="text/javascript" src="js/jquery.mobile.datebox.i8n.es.js"></script>
<script type="text/javascript" src="js/jqm-datebox-1.1.0.mode.flipbox.js"></script>
<script type="text/javascript"src="js/index.js"></script>
</head>