When you use the relationship report option on the online tree; it doesn't give the relationship on it's a close relationship between the two people. However on FTB when you do the same thing; it shows the relationship regardless of how close or distant the relationship is. Might I suggest changing the site version so that it's similar to that used in the program; so it can show a relationship regardless of if it's close.
The relationship report is one of the things I like the best - and can not really use it, since I have over 5-6000 people in my tree. The FTB - takes 10 seconds and you have the whole thing there, no matter amount of generations. Really irritating. In addition, on the smart-searches, I get up "direct ansestor" once in a while. If it is under 20 generations, support told me - but what's the point? We want this information. If I had known this - I would have taken another system. This was never told anywhere. This pisses me off 100%.
Sorry to hear you were counting on the relationship report! I understand that it's an important feature to you. I've contacted the developers and asked them put improving on the algorithm that calculates the relationships on the roadmap as soon as they can.