Hello

1. I think you cannot see newly posted Updates because you have "incorrect" Timeline block on a page where you've tested. For example, you are working with Home page and have 'Public Feed (Timeline)' block there. If you put 'Create Post' or 'Post to Feed' blocks on this page then you won't see newly posted updates, because they are posted in your author's profile context or some other if it was selected in Visibility field. In this case you should use 'Create Post (Public)' or 'Post to Public Feed' blocks.

2. When you removed '0=>0' from block description you've created 'Create Post (Public)' block from 'Create Post' one. 

So, let's summarize: Each 'Create Post' ('Post to Feed') block should be used with appropriate Timeline (Outline) block:

1. 'Create Post (Public)' and 'Post to Public Feed' should be used with 'Public Feed';

2. 'Create Post (Context)' and 'Post to Context Feed' should be used with 'Profile Feed';

3. 'Create Post' or 'Post to Feed' should be used with 'Feed'.

If you take a look at fresh installed Timeline app you'll see exactly the same block pairs on Home, Profile and Dashboard pages. To be sure, which create post adn/or timeline block is used on some page it would be better to check it via Studio -> Pages builder, because blocks have unique names there. In user end they are almost similar. Also you may read more about Timeline module and available Timeline/Outline blocks here.

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Best Regards
Anton