Too many image resized as uploading any image ?

Hey macatokio!

That is the correct behavior. The theme, like most WordPress themes, uses a function built in to WordPress to create multiple sizes of the same image so that the theme can use them in delivering the content to users.

It not only cuts down on bandwidth but it increases performance to users.

Cheers!
Devin

If you have other plugins installed that are also introducing image sizes then they could be similar sizes. The themes default sizes are:

$avia_config['imgSize']['widget'] 			 	= array('width'=>36,  'height'=>36);						// small preview pics eg sidebar news
$avia_config['imgSize']['square'] 		 	    = array('width'=>180, 'height'=>180);		                 // small image for blogs
$avia_config['imgSize']['featured'] 		 	= array('width'=>1500, 'height'=>430 );						// images for fullsize pages and fullsize slider
$avia_config['imgSize']['featured_large'] 		= array('width'=>1500, 'height'=>630 );						// images for fullsize pages and fullsize slider
$avia_config['imgSize']['extra_large'] 		 	= array('width'=>1500, 'height'=>1500 , 'crop' => false);	// images for fullscrren slider
$avia_config['imgSize']['portfolio'] 		 	= array('width'=>495, 'height'=>400 );						// images for portfolio entries (2,3 column)
$avia_config['imgSize']['portfolio_small'] 		= array('width'=>260, 'height'=>185 );						// images for portfolio 4 columns
$avia_config['imgSize']['gallery'] 		 		= array('width'=>845, 'height'=>684 );						// images for portfolio entries (2,3 column)
$avia_config['imgSize']['magazine'] 		 	= array('width'=>710, 'height'=>375 );						// images for magazines
$avia_config['imgSize']['masonry'] 		 		= array('width'=>705, 'height'=>705 , 'crop' => false);		// images for fullscreen masonry
$avia_config['imgSize']['entry_with_sidebar'] 	= array('width'=>845, 'height'=>321);		            	// big images for blog and page entries
$avia_config['imgSize']['entry_without_sidebar']= array('width'=>1210, 'height'=>423 );						// images for fullsize pages and fullsize slider

You can see and edit all of your sizes that WordPress has registered with this plugin:http://wordpress.org/extend/plugins/simple-image-sizes/

Plugins are not something you should be scared of using. Simple image sizes is a great plugin and keeps you from manually editing any files.

If you wanted to however you would remove the code from the functions.php within the theme. Keep in mind what you are removing and what effects that will have on images generated for front end use.