Hello, I experience similar difficulties while matching color labels in Photo Mechanic and LR. It only works partially ie. I can only use 3 colors...?
PM only allows assigning colors from #1 - #8 while LR is limited to #6 - #9 ... which means I get matching colors in LR only if I assign corresponding colors to #6 - #8 in PM! In all other cases LR will show WHITE color label.
I do see a problem with empty color label fields being filled in with default values. We'll get this fixed as soon as we can. A workaround might be to add a single space character to the label names that you're not using.
If the problem is that labels 1-5 can't be changed, then I suggest contacting our support folks for help with a preference reset.
By email: support@camerabits.com
By phone: +1 503.547.2800
Hours: Mon-Fri, 9:00am-5:00pm [PST/PDT]
-Jerry