1) For retention policy, I have configured "7 restore points to keep on disk". But I found over 7 restore points on backups disk. Any problems ?
Most likely, there is either active or synthetic full scheduled. So, at any given moment of time you have between 7 and 13 restore points on disk.
2) For backup copy, I found only 1 full backup and following with incremental. How to configure to have weekly FULL backup copy after weekly backup (Full) ?
Enable GFS retention scheme, plus, "read entire restore point from source repository" option.