Problem Solved.
Was reading some other threads and caught a little comment by Sans-Grip saying that TMPGenc 2.59 was having trouble with files sizes.
Light bulb came on. Checked my recently registered version. Yup 2.59!!
Switched back to 2.58 , re encoded and it was correct.
No offence to TMPGenc, but you'd think the could post a note saying its not working right somewhere.
Thanks to Sans Grips comment, this small nightmare is resolved.
Kwag: Suggestion:
A Forum header: Quirks Unveiled.
Where members can post thier latest discoveries and save others hours .
Mine would Say:
Problem: When muxing in TMPGenc, end result was huge file sizes that exceeded the original source file size.
Solution: Problem was with TMPGenc version 2.59. Uninstall and reinstall of 2.58 fixed everything.
What do you think?
PS. Thanks Karl, I won't be bothering you now that its settled
.