If the SCOPED_TO_CELLS constraint is applied to cells using a wildcard (*), it is only applied to the first cell found.
Does the SCOPED_TO_CELLS property support wildcards?
In Vivado Design Suite 2014.1 the SCOPED_TO_CELLS property does not support wildcards.
If wildcards are used then the property is only applied to the first cell found.
This issue has been fixed in the 2014.2 release.