Problems with quanity

A mounth ago I send mail with this issues but without any response from authors.. Please check this problems and resolve it. On an email You have all data to connetc to my site and check.

In my tests i see problems with quantinty and reporsts:

1. If I select intermediate stop the seats are not recalculated at all  – https://prnt.sc/OUAae2sUSRSt here seats is incorrect but see more -> https://prnt.sc/M_-uBFy0iMsh and the second order https://prnt.sc/qCZHJs9mpbCA we have overbooking.  
2. reports are wrong?https://prnt.sc/LJdis1tG-f4O?:
   • order date is not in correct date (here the letter “T” should be replaced by <br>  or  this  should be added before to get it in two lines)
   • here i have no information about last ticket where was selected part of route. 
   • The booking time is based on order date but in my opinion there should be a journey date or journey date should be added to this table. 
   • if I select at filter the journey date from clients order i have no data -> https://prnt.sc/4sC4ZYqh7vol
3. The part route looks working wrong:
   • https://prnt.sc/t2MKzkM9ybLH here should be this bus https://kolejka.pnv.pl/wp-admin/post.php?post=42980&action=edit -> https://prnt.sc/lx8c3DV09fSh

The page I need help with: [log in to see the link]