Refining the online store on cs cart

There is an online store on the cs-cart and VPS server, you need to refine the following points:

1. Webmaster swears at the superfluous subdomains created by wild card technology (the strangest thing is that these sub-domestics can go https://prnt.sc/10bzdj1 globally, I think there is a problem in the work of the plug-in from cs coding, which allows you to do any combinations of pages and they will work that so https://instyle63.ru/zhenskaya-odezhda/platya/xs-4 ... thats so https://instyle63.ru/zhenskaya-odezhda/platya/shel... I dont think thats true.

2. Still webmaster swears at the fact that the site slowly responds http://prntscr.com/10jg4zy feels like there is some problem in working with kesh

3. Very often the site falls off https://prnt.sc/10bzhvh a couple of times a month exactly sites - subdomens become inaccessible

4. The plugin that generates sitemap for something started doing duplicate pages inside itself: https://prnt.sc/10bzsfr