Trouble - can`t get variable in template from plugin

[Ljusya]

Please, help with my code:

I have 2 plugin

First - in blog_entry_start


Code:
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Second in blog_list_entries_start


Code:
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And template 'mytemplate' with code


Code:
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Both plugin work - phrase "some text" appear in the right places But text from variable $myvar appear only in places of blog_entry_start

How can i get my variable for use in mytemplate from second plugin in hook blog_list_entries_start ? Why similar code gives different results?

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Nobody can`t help me?