Hmmm...it seems to be working on my end. We just made some corrections two days ago so if it's in referance to a zone made earlier from this, you will have to go in and correct it.
BUT if that's not it, let me know exactly what you are doing that's not working or the numbers that you are getting that seem wrong.
I go into Edit in Cycle HR Zones. Enter a HR into the LT parameter box and hit calc. Nothing happens. The numbers that are there don't change. If I clear everything, the labels change but not the numbers.
Ahhh...I replicated it, in the edit-zone screen. Ok, we will have that fixed. Thanks.
NOTE, a temporary workaround is to enter a number for a different calculatior, hit 'calc' THEN go back to your LT number and put it in and hit 'calc', it will then update the LT zones.