Alloy bug: Global collection is overriding others?

Collections.js

var collection = Alloy.Collections.collection;

var openAddItem = function(){
  var win = Alloy.createController("CollectionDetail").getView();
  win.open();
}

function dataTransform(model) {
  var transform = model.toJSON();
	transform.title = transform.first + " " + transform.last;
	return transform;
}

//init - get the data
collection.fetch();

Collections.xml

<Alloy>
  <Collection src="collection"/>
  <Window id="win">
	    <RightNavButton>
    		<Button onClick="openAddItem">Add</Button>
    	</RightNavButton>
    	<SearchBar id="search" />
		  <TableView id="table" dataCollection="collection" dataTransform="dataTransform">
        <TableViewRow class="row" model="{id}" >
  			  <Label id="titlel" class="rowTitle" text="{name}"/>
			  </TableViewRow>
    </TableView
	</Window>
</Alloy>

index.xml

<Alloy>
  <TabGroup id="tabgroup">
  	<Tab id="tab1" title="Tips">
		  <Require src="Tips" id="tipsWindow" title="Tips"/>
		</Tab>
		<Tab id="tab2" title="Collections">
			 <Require src="Collections" id="MyCollections" title="My Collections"/>
		</Tab>
	</TabGroup>
</Alloy>

Tips.js

var tipCollection = Alloy.Collections.tip;

var openAddItem = function(){
  var window = Alloy.createController("TipDetail").getView();
	window.open();
}


$.win.addEventListener('close', function() {
  // destroy global collection/model for our bindings - memory leaks.
	$.destroy();
});

//sorting by date
tipCollection.comparator = function(entry1, entry2) {
	return entry1.get('modifiedDate') > entry2.get('modifiedDate') ? -1 : 1;
}

//DATA transform of tableView
function dataTransform(model) {
	var transform = model.toJSON();
	transform.modifiedDate = moment(transform.modifiedDate,'YYYY-MM-DD HH:mm:ss').fromNow();
	transform.city = transform.city + ", " + transform.country;
	return transform;
}

var refresh = function(){
  // update data from remote
  tipCollection.fetch();
}

//init - get the data
tipCollection.fetch();

Tips.xml

<Alloy>
  <Collection src="tip"/>
	<Window id="win">
    	<LeftNavButton>
    		<Button onClick="refresh">Refresh</Button>
    	</LeftNavButton>
    	<SearchBar id="search" />
		<TableView id="table" dataCollection="tip" dataTransform="dataTransform">
			<TableViewRow class="row" model="{id}" >
				<Label id="titlelabel" class="rowTitle" text="{name}"/>
				<Label class="rowSubTitle" text="{city}"/>
				<Label class="dateLabel" text="{modifiedDate}"/>
			</TableViewRow>
		</TableView>
	</Window>
</Alloy>

Any solutions to this issue yet? I'm kind of stuck with the same problem