Time machine after replacing Mac hard drive

After I replaced my Mac's system drive, Time Machine won't go back prior to the change, even though the data's still in the Backups.backupdb directory.
Here's my system:
MacPro 2x2.8 GHz Quad-Core Intel Xeon, 6GB RAM
320 GB internal drive = "MacHD" = system drive
1 TB internal drive = "HD1" = new internal drive that will replace MacHD
2 TB external drive = "BKUP_TM" = Time Machine drive
Here's what I did:
1. Install and format HD1 as Mac OS Extended (Journaled)
2. Clone MacHD to HD1 using SuperDuper, with "copy all files" and "make bootable" options enabled
3. Remove MacHD and reboot computer with HD1 as new system drive
4. Mount BKUP_TM
5. Allow Time Machine software run overnight to do whatever it wants (it recognized the BKUP_TM drive immediately and without my input)
6. Launch Time Machine software after it completes its activity. This is where I noticed that I could only look back in time 1 day to the point of step 5 above.
7. At the finder level, open the BKUP_TM drive and notice that:
A. The data is all held in one directory (as expected)
B. The data still goes back to August 2012 (as expected)
Here's my overall question:
How do I get Time Machine to access the data correctly?
If I have to, I could reinstall the MacHD drive, erase HD1 and start over, but I'm concerned that even that would not get me back to being able to access the full depth of my Time Machine data in the Backups.backupdb directory.
Thanks, in advance, for the help,
-SD

Yes. The good news is all my data is safe on:
- the original location of MacHD (currently not installed in the Mac)
- the new location of HD1
- the TM drive of BKUP_TM
Might it be a good idea for me to do this?
1. Manually delete any directories on BKUP_TM that are after the change from MacHD to HD1
2. Reinstall MacHD and remove HD1
3. Boot from MacHD
4. Mount BKUP_TM so that it will see MacHD and reassociate itself with MacHD
5. Reinstall HD1 and reformat it
6. Remove MacHD
7. Boot from OS DVD
8. Use Time Machine to restore from backup (on BKUP_TM) or use Migration Assistant to populate HD1.
This idea has flaws (would step 4 work??) and is a lot of steps and time, but it *might* get me back to a usable TM history.
I should note this: NO work has been done on this computer since I first introduced HD1. This means that I will lose NO data if I go back to MacHD as my system drive and use it as the new starting point.
That's just my idea. All ideas are welcome.

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sohs wrote:
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