There is absolutely no QA for this product. I've created and re-created apps that constantly stop letting me edit them. I don't write in Groovy so I use the UI to create rules which is a monumentally painful process.
Then when I create my rule, the UI behaves bizarrely. Sometimes it allows me edit my conditions, sometimes it doesn't. Sometimes it throws me into a different condition to edit than the one I selected. Sometimes if I edit an entirely different condition, it allows me to come back and edit the original condition I want to edit.
WTF is going on with this UI? Is the only way to create apps using Groovy? I'll do it if so, but please QA your UI, it's the worst I've ever dealt with.
If there was a single workflow that was broken, I would be able to give you my STR my problem but there are so many bugs in the product while editing that I can't even figure out how the product is supposed to work and where there is a bug.
Not that it should happen... but some things I have noticed which may help you:
Often I go to edit something, and there is no option to do so - only create new. So I select something from the drop down, then after it comes up, I click cancel. Then after the page refreshes it will show the edit button. A little weird to have to do that, but not much other choice when you can't use the back button.
Sometimes you go to create an action, and you change your mind / clicked wrong, and then you try to cancel out of it, but when you go back in to create it correctly the original reappears as if you want to continue where you left off versus start new. Usually when this happens I am concerned the rule is corrupt and start again. But, if you aren't concerned, you can usually get this to go away by finishing the original action/condition you didn't want, and then deleting it. But I've seen this issue a lot less lately, it may have been squashed.
Finally always wait for the page to fully load. I often click faster than the UI refreshes - such as I make a change, see the done button and click on it. But at the same time the page refreshes, and I've actually clicked on something else (usually edit conditions). This doesn't seem to have any poor effect on your rule, just brings you to the wrong screen and can be frustrating.
Not saying the above should happen, but it helps to know that is what is happening
I tried editing a few times and it's way more work than it's worth
Just delete the Else-If and insert above... and enter the new condition
AND, if at all possible, use Simple Lighting or other apps, like was said above, RM is not for the faint of heart
What I get frustrated about is a rule can run fine for days, weeks or months, then it stops working, I come here and folks say, oh this is wrong or that is wrong... WTF, it's been working fine and now it stops...
So hard to follow along and learn, for me at least