[Plugin: podPress] 2 MP3s on a post, itunes only showing one!?

Posts (entries) in ATOM feed can have multiple attachments/enclosures. But the problem here is iTunes and not the RSS specification. iTunes can process ATOM feeds but it will always show only one of the media files.
That is why it is not recommendable to attach multiple media files to one post. One exception is if you want to publish an episode in different file types (.mp3, .m4a, .ogg etc.).

Any comments in the Event Calendar plugin clash?

I have installed Event Calendar 3 v3.1.4. I installed it in a WP 3.3.x test blog and it generates on the blog pages and the feeds PHP error messages which make it impossible to view the RSS feeds at all.
But these particular problems are obviously related to the PHP version on my test server. I installed http://wordpress.org/extend/plugins/event-calendar-3-for-php-53/ afterwards. This version does not trigger the same problems and I could also not reproduce the situation which you described in the first post. But maybe I used different settings.
Please, post your settings for Show schedule within posts: and
Show events as blog entries: and tell me whether the posts which were not in the feeds at first were events.

Tim

If you are not afraid of modifying the code of the event calendar plugin a little bit, you can make the plugin hide the events also in excerpts.

Edit the file eventcalendar3.php lines 592-596 (the file of the Event Calendar 3 for PHP 5.3 has some more lines and you can find the same code a little bit lower.)
old:

if(!$ec3->hide_event_box)
    add_filter('the_content','ec3_filter_the_content',20);

  remove_filter('get_the_excerpt', 'wp_trim_excerpt');
  add_filter('get_the_excerpt', 'ec3_get_the_excerpt');

new:

if(!$ec3->hide_event_box) {
    add_filter('the_content','ec3_filter_the_content',20);

  remove_filter('get_the_excerpt', 'wp_trim_excerpt');
  add_filter('get_the_excerpt', 'ec3_get_the_excerpt');}

By adding the curly brackets you include the lines which are related to excerpt filters into the if-condition and both lines will be executed only if hide_event_box is FALSE or in other words: if you chose “Show Schedule” (within posts).

Would be good if that was done automatically, maybe when the post is saved as draft or published.

Yes it would be good. But the auto detection may take in some cases more than a few seconds. Sometimes the process ends with no result. In such cases the author would noticed that only after saving and viewing the post on the front page and had to head to the editor page once more to adjust the value manually.
That is why I will not change this part of the plugin.

Is it possible to change the episode name from the post name to the Media File Title (the one specified manually by the user when embedding a file in a post!?)

I think I will implement a function which will use the Media File Title as the post title if the Media File Title input field is not and the post title input field is empty (during the publishing process).