raise minimum for min mixes before mixing out to 2

src/main/java/com/sparrowwallet/sparrow/control/UtxosTreeTable.java

@@ -25,7 +25,7 @@ public class UtxosTreeTable extends CoinTreeTable {
         });
         dateCol.setCellFactory(p -> new DateCell());
         dateCol.setSortable(true);
-        dateCol.setComparator(TableColumnBase.DEFAULT_COMPARATOR.reversed());
+        dateCol.setComparator(dateCol.getComparator().reversed());
         getColumns().add(dateCol);
 
         TreeTableColumn<Entry, Entry> outputCol = new TreeTableColumn<>("Output");

src/main/java/com/sparrowwallet/sparrow/wallet/MixToController.java

@@ -95,9 +95,9 @@ public class MixToController implements Initializable {
         });
 
         int initialMinMixes = mixConfig.getMinMixes() == null ? Whirlpool.DEFAULT_MIXTO_MIN_MIXES : mixConfig.getMinMixes();
-        minMixes.setValueFactory(new IntegerSpinner.ValueFactory(1, 10000, initialMinMixes));
+        minMixes.setValueFactory(new IntegerSpinner.ValueFactory(2, 10000, initialMinMixes));
         minMixes.valueProperty().addListener((observable, oldValue, newValue) -> {
-            if(newValue == null || newValue < 1 || newValue > 10000) {
+            if(newValue == null || newValue < 2 || newValue > 10000) {
                 return;
             }