In Backlog, items are missing though Fix version is set with "Backlog"
Changing the name in one sprint in one project is affecting the other sprint in other project
for eg., Sprint in GIMs project : GIMS 20.1.0 is reflected in KGIMs project as GIMS 20.1.0(Kgims sprint)
Some items are missing in sprint though it has sprint and fix version assigned
Items missing : Check Board filter & make sure status are mapped to respective columns
Sprint Names : may be you or Jira users are using same sprint in two different projects
You need to use different sprint for different project if you use same then it will get effect