Why does replace component change refdes

Why does MS change the refdes of a part when the replace component command is used?
Here is an example. Say I have a schematic that has R1-R20 on it.  All parts are from the User DB and have part number, vendor info, etc.    Later I decided to remove R1.  Then I decide to use the replace component on R8 with a different resistor from the user DB.   MS now decides to change the RefDes to R1.
It doesn't do it all the time and I haven't been able to isolate when it seems to happen.
This is a major pain when the design has already been exported to UB and routed.
Is this a known bug?  Is it considered a bug or a feature?  Is there a way to disable this renaming?
Thanks,

GregW ,
Which version are you on?   This shouldn't be happening for single section components- if it is it is a bug.   For multisection components you should be prompted since an existing portion of the part may already be in use.
In the v10.1 a replace of a single section component does not seem to change the refdes.   If it is happening can you send the file directly to me (or at least a representative file tjat shows the issue) so to allow us to reproduce this issue.   You can also file a customer support request.
Regards,
Patrick Noonan
Business Development Manager
National Instruments - Electronics Workbench Group
50 Market St. 1-A
S. Portland, ME 04106
Email: [email protected]
Tel. (207) 892-9130
Fax. (207) 892-9508 

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