diff --git a/base/mp_stackdiffs.sas b/base/mp_stackdiffs.sas
index 33b1ba4..d35052b 100644
--- a/base/mp_stackdiffs.sas
+++ b/base/mp_stackdiffs.sas
@@ -299,6 +299,7 @@ proc transpose data=&ds1d(where=(tgtvar_type='C'))
   var OLDVAL_CHAR;
 run;
 data &outdel;
+  if 0 then set &baselibds;
   set &ds2d;
   set &ds3d;
   drop key_hash;
@@ -328,6 +329,7 @@ proc transpose data=&ds1a(where=(tgtvar_type='C'))
   var NEWVAL_CHAR;
 run;
 data &outadd;
+  if 0 then set &baselibds;
   set &ds2a;
   set &ds3a;
   drop key_hash;
@@ -358,9 +360,13 @@ proc transpose data=&ds1m(where=(tgtvar_type='C'))
   var NEWVAL_CHAR;
 run;
 data &outmod;
+  if 0 then set &baselibds;
   set &ds2m;
   set &ds3m;
 run;
+proc sort;
+  by &key;
+run;
 
 /**
   * Extract matching records from the base table
@@ -422,8 +428,8 @@ run;
   * Problems - where record already exists, or base table has columns missing
   */
 %let missvars=%mf_wordsinstr1butnotstr2(
-  Str1=%mf_getvarlist(&outadd),
-  Str2=%mf_getvarlist(&baselibds)
+  Str1=%upcase(%mf_getvarlist(&outadd)),
+  Str2=%upcase(%mf_getvarlist(&baselibds))
 );
 %if %length(&missvars)>0 %then %do;
     /* add them to the err table */
@@ -480,7 +486,7 @@ select distinct tgtvar_nm into: missvars separated by ' '
   where move_type='M' and is_diff=1;
 %let missvars=%mf_wordsinstr1butnotstr2(
   Str1=&missvars,
-  Str2=%mf_getvarlist(&baselibds)
+  Str2=%upcase(%mf_getvarlist(&baselibds))
 );
 %if %length(&missvars)>0 %then %do;
     /* add them to the err table */
@@ -524,9 +530,10 @@ select distinct tgtvar_nm into: missvars separated by ' '
     if not b;
   run;
   /* now - we can prepare the final MOD table (which is currently PK only) */
-  proc sql(undo_policy=none);
+  proc sql undo_policy=none;
   create table &outmod as
-    select a.* /* includes KEY_HASH from audit ds */
+    select a.key_hash
+      ,b.*
     from &outmod a
     inner join &base b
     on &keyjoin
@@ -552,7 +559,8 @@ select distinct tgtvar_nm into: missvars separated by ' '
   proc datasets lib=work;
     delete &prefix:;
   run;
+  %put &sysmacroname exit vars:;
+  %put _local_;
 %end;
-
 %mend mp_stackdiffs;
-/** @endcond */`
\ No newline at end of file
+/** @endcond */
\ No newline at end of file
diff --git a/tests/crossplatform/mp_stackdiffs.test.sas b/tests/crossplatform/mp_stackdiffs.test.sas
index 5fc2e00..8be96a8 100644
--- a/tests/crossplatform/mp_stackdiffs.test.sas
+++ b/tests/crossplatform/mp_stackdiffs.test.sas
@@ -45,8 +45,12 @@ run;
 /**
   * Deletions test - where record does not exist
   */
+data work.final1;
+  set work.final;
+  where move_type='D';
+run;
 %mp_stackdiffs(work.orig
-  ,work.final
+  ,work.final1
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds1
@@ -69,8 +73,12 @@ data work.orig2;
   set sashelp.electric;
   if _n_ le 10;
 run;
+data work.final2;
+  set work.final;
+  where move_type='D';
+run;
 %mp_stackdiffs(work.orig2
-  ,work.final
+  ,work.final2
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds2
@@ -94,8 +102,12 @@ data work.orig3;
   set work.orig;
   stop;
 run;
+data work.final3;
+  set work.final;
+  where move_type='A';
+run;
 %mp_stackdiffs(work.orig3
-  ,work.final
+  ,work.final3
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds3
@@ -119,8 +131,12 @@ data work.orig4;
   set work.orig;
   if _n_>35 then stop;
 run;
+data work.final4;
+  set work.final;
+  where move_type='A';
+run;
 %mp_stackdiffs(work.orig4
-  ,work.final
+  ,work.final4
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds4
@@ -144,8 +160,12 @@ data work.orig5;
   set work.orig;
   drop Coal;
 run;
+data work.final5;
+  set work.final;
+  where move_type='A';
+run;
 %mp_stackdiffs(work.orig5
-  ,work.final
+  ,work.final5
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds5
@@ -167,7 +187,7 @@ run;
   */
 data work.final6;
   set work.final;
-  drop Coal;
+  where tgtvar_nm ne 'COAL' and move_type='A';
 run;
 %mp_stackdiffs(work.orig
   ,work.final6
@@ -194,8 +214,12 @@ data work.orig7;
   set work.orig;
   drop Coal;
 run;
+data work.final7;
+  set work.final;
+  where move_type='M';
+run;
 %mp_stackdiffs(work.orig7
-  ,work.final
+  ,work.final7
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds7
@@ -220,14 +244,16 @@ run;
   test=EQUALS 0
 )
 /**
-  * Modifications test - where base table has missing rows
+  * Modifications (big) test - where base table has missing rows
+  * Also used as a full integration test (all move_types)
+  * And a test if the actual values were applied
   */
 data work.orig8;
   set work.orig;
   if _n_ le 16;
 run;
 %mp_stackdiffs(work.orig8
-  ,work.final7
+  ,work.final
   ,CUSTOMER YEAR
   ,mdebug=1
   ,errds=work.errds8
@@ -243,14 +269,6 @@ run;
   desc=Mod8 - 6 records populated (missing rows relevant),
   test=EQUALS 6
 )
-%mp_assertdsobs(work.add8,
-  desc=add8 - 0 records populated ,
-  test=EQUALS 0
-)
-%mp_assertdsobs(work.del8,
-  desc=del8 - 0 records populated ,
-  test=EQUALS 0
-)
 
 /**
   * Modifications test - were diffs actually applied?
diff --git a/tests/testinit.sas b/tests/testinit.sas
index e1026ea..a877f16 100644
--- a/tests/testinit.sas
+++ b/tests/testinit.sas
@@ -15,7 +15,8 @@
 %mp_init()
 
 %macro loglevel();
-  %if &_debug=2477 %then %do;
+  %if "&_debug"="2477" or "&_debug"="fields,log,trace" %then %do;
+    %put debug mode activated;
     options mprint;
   %end;
 %mend loglevel;