Don't use the Sony CMU software. Premiere Pro is very specific about the file format and folder structure, and if you want to retain metadata/timecode, you need to preserve the folder structure as it was recorded to the card. The Sony software changes that structure--I believe it's creating a Bluray folder structure, which is similar to AVCHD's--and the metadata will not be preserved.
Just copy with the OS file browser, not with a third-party application. It's not a bug; it's a limitation of the format.
hum... thank you Collin,
i don't like the filename limitation structure of .mts files, i will prefere m2ts filename limitation.
I hope we (adobe or sony) will found solution to correct this problem.
I suspect Sony won't change anything, and like I said, this isn't a "bug" for Adobe to fix. I'm not sure what you want can even be done, but make a feature request: Adobe Feature Request/Bug Report Form
If you want timecode, your only option is to preserve the file and folder structure directly from the card.