Issue
This is a Site Studio bug that occurs when there are "nested" components inside a view's template that uses component dropzones.
For example, let's say you have an "outer" Component that contains a Row for Columns and inside that a Component Dropzone. You also have an "inner" Component with a Column containing another Component Dropzone.
Outer:
Inner:
Finally you combine those two Components in a View Template where you drop a Pattern Repeater in the "outer" Component's Component Dropzone, the "inner" Component inside the Pattern Repeater, and a View Item inside the "inner" Component's Component Dropzone.
View Template:
While the structure you have created is completely valid if you skipped the use of Component Dropzone, with them in place the resulting view will render unexpected results (e.g. the first item multiple times).
Affected Applications/Limitations
Any Site Studio site using a setup like the one described above.
Resolution
This bug has been addressed on version 6.4 of Site Studio.
https://sitestudiodocs.acquia.com/6.4/user-guide/version-6-4-0-release-details