What steps will reproduce the problem?
1.  On my RESTO DRUID ONLY (no idea why not on any other toon).
2.  Have both bar 1 and bar 7 visible on screen.
3.  Move a macro into any position in bar 1 and it duplicates in bar 7.
4.  Delete it from one or the other and it deletes from the other one.

What is the expected output? What do you see instead?
I would expect to see bars 1 and 7 behaving independently from one another.  What I'm seeing is that they appear to be mirroring one another.  Any change in button contents for bar 1 is duplicated for bar 7 and vice-versa.

What version of the product are you using?
Bartender 4 - release version only.  WoW English US.

Do you have an error log of what happened?
Does not generate an error.

Please provide any additional information below.
Only occurs on my RESTO DRUID character, not on my Hunter, Demon Hunter, Mage, Rogue, Shammy, Priest, or any of the other classes I have (everything except DK - don't like DK).

I don't know how helpful this is, but I use ALL of the bars.  Bars 1 and 2 are 4 buttons each, bar 3 is 5, bar 4 is 4, bars 5-10 are 12, bag, micro, pet, vehicle all enabled and visible when in use.  I have NO stance setting active (I handle stances differently - manually).  I have not been able to detect any other overlap between bars.  I took some time to fiddle with it to see.

I've been digging in the distro folder for something obvious to send with this in the way of a config file, but I can't find anything.  If you'll let me know what to sent you, if there is anything that would be useful, let me know and I'll post it.