Adwords negative cross device conversions

We have an adwords account (2800990872), with negative cross device conversions (Conversions is higher than AllConversions). This is happening for both the Geo Performance and Search Query Performance reports. 

date of query 8/31/2016

Device

Date

CountryCriteriaId

RegionCriteriaId

CityCriteriaId

Clicks

ConversionValue

ViewThroughConversions

Conversions

CrossDeviceConversions

AllConversions

Interactions

VideoViews

Mobile devices with full browsers

2356

20462

1007788

0

-5

0

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