JBDC response does not return an "" when element does not exist

Upon checking the version of ready api that we are currently useing i find the following information:

Ready! API 1.4.1
© SmartBear Inc. 2007-2015
http://www.smartbear.com

  So yes the version is 1.4.1

as far as the information returned 

the datasink for soapui ng pro has the following information set as name / value for one of the  fields:

PLUS ONE / ${SQL Query - PLUS1#ResponseAsXml#//Results[1]/ResultSet[1]/Row[1]/DEVICE_ID[1]}

and the datasink for soapui pro (5.1.1) has the following information set as name / value for the same field 

PLUS ONE / ${SQL Query - PLUS1#ResponseAsXml#//Results[1]/ResultSet[1]/Row[1]/DEVICE_ID[1]}

as you can see they are the same.

with the same exact data source file the programs returns different results.

SoapUI NG Pro returns :

(accountnumber),(resource),(source),(stateid), (resource2), (source), (stateid), (resource3), (source), (stateid) ,

${SQL Query - PLUS1#ResponseAsXml#//Results[1]/ResultSet[1]/Row[1]/DEVICE_ID[1]},

${SQL Query - PLUS1#ResponseAsXml#//Results[1]/ResultSet[1]/Row[1]/SOURCE[1]},

${SQL Query - PLUS1#ResponseAsXml#//Results[1]/ResultSet[1]/Row[1]/DECODEPIN.DEVICE_T.STATE_IDNULL1RESERVED2ACTIVE3INACTIVEOTHER-PIN.DEVICE_T.STATE_ID[1]}

where as SoapUI Pro returns:

(accountnumber),(resource),(source),(stateid), (resource2), (source), (stateid), (resource3), (source), (stateid) ,,,

as some of the resources may or may not exist on any given account it is actually very important to keep track of that fact.

If i was to add a grovy script to remove the incorrect information i am assuming that i would,

1.use a regex to locate the text to remove from the file itself

2.replace the text with a ""

so would this be done after the datasink and before the datasource loop or would i want to do that in a while or loop statement after the datasource loop?