Octatrack safe workflow with patterns

Trying to understand and practice this forum page about ‘Parts’.
So I just did a ‘Bank 1’ of 6 patterns using Samples on Flex Tracks 1 thru 6, and PART 1. All good --Saved all patterns, Parts and Project.
Then, started a New ‘Bank 2’ with totally new Pattern 1, using PART 2. and all New Samples in the Flex slots Tracks 1 thru 6. All good. Now I switch back to listen to my original Bank 1’ of 6 patterns with supposedly the original Bank 1 Samples on Flex Tracks 1 thru 6, and PART 1, and they are playing the Bank 2 samples and sound totally wrong…
What did I do that caused this? In theory, everything in Bank 1 should have been the Original Bank 1 and Part 1…Thank God I saved the original Bank 1 stuff. All confused now.