@evb, I really don't know why you get that high consumption of 133uA, but there is defenently someting wrong. Sorry that I cant help.
I use my own pcb design but it's basically the same as a mini pro without reg and led + RFM69HW. All my 328 chips is sourced from china and working fine.
I just measured on of my older designs with 8mhz/no BOD and I get about 6.7uA in timed sleep (WDT active), including 1M/470k voltage divider.
With the same setup without 1M/470k voltage divider and with external interrupt wake-up (sleep forever) I have about 0.8uA.
This was measured with two different multimeters with uA range. Sure, in this range a multimeter is not as accurate as the uCurrent or similar instruments, but IMO more than good enough for this kind of measurement.
If you are able to solve your main problem, I have a few other tips for further tweeking:
- Don't use bootloader with BOD, you don't need it for a sensor that is continous connected to the battery. Saves 20-25uA.
- If you power from 3V battery, don't use the suggested 1M/470k voltage divider for battery monitoring, you can do battery monitoring with code only (search here on the forum for it). Saves 2uA.
- You could perhaps gain a tiny bit more by setting all unused pins to LOW OUTPUT or LOW INPUT.
Some very good info on ATmega 328 power consumption here: https://www.gammon.com.au/forum/?id=11497