Some posts on my homepage are shifted to left

It looks like you have posts outside of the <div class="mid"> section.

Probably a misplaced </div>.

i am pretty sure it is this post:
?OCUK YET??T?R?RKEN
which has a excess </div> at the end of the content (probably from copy/paste action)

– check the post in html mode of the editor and see if you can find this </div> – then delete it

Thank you so much! This is great! I really appreciate it. Thank you so much again. Best wishes, Evren.

should the sidebar be off to the bottom on the front page:
there is a </div> too many in index.php, just before the call of the sidebar; (you could just remove one and see if this has negative effects in other files. difficult to tell which one is the exact one, without seeing the code of both index.php and single.php).

if you want, you could paste the code of two files into a https://wordpress.pastebin.com/ each and post the two links here.