In short -
I think you'll need to do a service scan.
Possibly do a firmware update too.
Longer version -
If there's no 'Revision' field listed, then you must be on quite old (relative to current) firmware.
In MENU>>Information>>About, the firmware version is the value of 'Last upgrade' field in older firmware releases, or the 'Revision' field in newer firmware.
A HDD replacement doesn't affect the firmware nor any settings, timers, et. al., as they are stored in flash memory.
I'm a bit surprised Mark didn't do a firmware update to the latest 20191106 at the time of the new disk install.
The Service reference for 9Gem HD Perth is '1:0:19:465:460:1012:EEEE0000:0:0:0:' so the bits that identify Nine Perth as a broadcaster is the 5th/6th segments (TSID/ONID) of '460' and '1012', and the bit that identifies 9Gem HD Perth is the SID value '465' in the 4th segment. The value of'19' in the 3rd segment means this is an MPEG-4 HD transmission.
You have reported 9Gem HD Perth as having '19:465:490', so that's the correct service type (MPEG-4 HD) and SID ('465') for 9Gem HD Perth so I think you just misread the TSID as '490' instead of '460'.
IceTV will be sending EPG data and timers for 9Gem HD Perth programs using the Service reference of '1:0:19:465:460:1012:EEEE0000:0:0:0:' so this must match in the service scan data tables stored on your Wiz.
Your Money (Perth) had a different service type of '1' (SD) and was using Service Reference '1:0:1:465:460:1012:EEEE0000:0:0:0:'.
IceTV will now "prefer" the HD service over the SD service, so it'll be sending timers using 9Gem HD Perth's ONID/TSID/SID. These 9Gem HD timers show in your timer list as matching Your Money because you've not done a service rescan since last July when 9Gem HD replaved Your Money.
I suspect you'd see the same thing with 7mate HD as it replaced 7food.
Thus, I think you'll need to do a service scan.
If your firmware version is prior to 20191106 then I think you should do a firmware update. The latest is available from the Beyonwiz web site
https://beyonwiz.com.au/downloads/If the 'Release' is '17.5' series (firmware '20190207' or '20180417'), then you can backup your settings before doing the firmware update, and then restore the settings afterwards. If the 'Release' is '16.1' then you need to set up from scratch (in that case don't forget to resend all timers from your IceTV account).