Local Report Confusion

Okay, so I'm working with a local report via the Web ReportViewer
control, and there is something going on that I don't quite get. I
created my object datasource and it was available to me via the "data
source" window when i created my RDLC report. All good here. Well along
the way, I have made changes to the class that represents my data
source object, and here is what I'm seeing being auto-inserted into my
ASPX file:
<rsweb:ReportViewer ID="ReportViewer1" runat="server" >
<LocalReport ReportPath="MyReport.rdlc">
<DataSources>
<rsweb:ReportDataSource DataSourceId="ObjectDataSource1"
Name="MyObject" />
<rsweb:ReportDataSource DataSourceId="ObjectDataSource1"
Name="MyObject1" />
<rsweb:ReportDataSource DataSourceId="ObjectDataSource1"
Name="MyObject2" />
<rsweb:ReportDataSource DataSourceId="ObjectDataSource1"
Name="MyObject3" />
<rsweb:ReportDataSource DataSourceId="ObjectDataSource1"
Name="MyObject4" />
</DataSources>
</LocalReport>
</rsweb:ReportViewer>
<asp:ObjectDataSource ID="ObjectDataSource2" runat="server"
SelectMethod="GetMyObjects" TypeName="Merchant"></asp:ObjectDataSource>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
SelectMethod="GetMyObjects" TypeName="Merchant"></asp:ObjectDataSource>
By the time the "MyObject3" I started wondering if there is some hidden
(or at least not obvious) versioning going on with my object data
class, in that each time I change it and rebuild it, it is given a new
name in the data source pane. What's really odd though, is that only
the most recent appears to be available (assuming that is what is going
on). So why do all these new <rsweb:ReportDataSource /> rows keep
appearing in my ASPX? Am I somehow creating multiple connections to my
datasource? Is this a result from each time I change the class that
represents my underlying data source object? Do I need to keep all
these entries, or can I dump all the old ones and just keep the newest
one? Finally, how did I end up with multiple "OjectDataSource" objects?
I started deleting them, and then having to repoint the reportviewer
control to an existing ObjectDataSource control.
If anyone can clarify what is going on, I would be very grateful.
Thanks!
ChrisQuick update: I see that changing my class isn't what causes the
insertion of new <rsweb:ReportDataSource /> items in my ASPX. Just now
I added a new table, and now when I run it I get the error "A data
source instance has not been supplied for the data source 'MyObject5'."
If you look at my previous post, there was no "MyObject5". Now when I
click on the smart tag for the reportviewer object in design view and
select "Choose Data Sources" I get the pop up grid that now asks me to
associate an ObjectDataSource with this new MyObject5. So again, in
this dialog, I have a column called "Report Data Source" and a column
called "Data Source Instance". Right now my grid (after associating
this latest one) looks something like this:
Report Data Source Data Source Instance
MyObject ObjectDataSource1
MyObject1 ObjectDataSource1
MyObject2 ObjectDataSource1
MyObject3 ObjectDataSource1
MyObject4 ObjectDataSource1
MyObject5 ObjectDataSource1
Thanks!