Hello, well everyday some new issue :(
this time I have made Blog and I have on left sidebar positions:
1. searbar
2. Category listing (4 category)
3. tags cloud Moduls and I have 4 Items to each ctegory I created.

The problem is when I open blog menu and click on categories FROM module on sidebar, it shows me my Item BUT also some very big Placeholder (div class="itemsCategory") .

When I click on Categories from Blog on same page BUT NOT from sidebar moduls but on image I added to Items, it show normal and not big placeholder show up.

Also I have my url when click on normal blog category from NON sidebar modul like this: ../blog/content/35-video-tutorials/ BUT WHEN click on same category from NON MODUL but from blog content, I get my wanted URL: ../blog/video-tutorials

How to resolve this issue pls?
thanks

This is a template issue.
Since you have used a quickstart package you should ask the template developer for information because they will know how the package's structure.

and this:
Also I have my url when click on normal blog category from NON sidebar modul like this: ../blog/content/35-video-tutorials/ BUT WHEN click on same category from NON MODUL but from blog content, I get my wanted URL: ../blog/video-tutorials

You need to address this issue to the template developer.
There is no way for me to know your menu structure.