'Overlapping mount on Linux Server

I am able to mount two LVMs on the same mount. Is it overlapping? Do we have more information on why and how this is happening or a way to not allow this ?

[root@ip-10-10-1-218 ~]# lvscan
  ACTIVE            '/dev/justinvg/data1' [3.00 GiB] inherit
  ACTIVE            '/dev/justinvg/data2' [4.00 GiB] inherit
[root@ip-10-10-1-218 ~]# 
[root@ip-10-10-1-218 ~]# mount | grep /u01
/dev/mapper/justinvg-data1 on /u01 type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
/dev/mapper/justinvg-data2 on /u01 type xfs (rw,relatime,seclabel,attr2,inode64,noquota)


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