There is a limit on the number of instances you can queue for, which seems, at the moment at least, to be around ten instances. At that point, it just started telling me that I couldn't add any more to my list. But, as you can see to the right-hand side, it is very possible to queue for a large number of LFRs all at once, and add more to your queue list as you complete them. What it doesn't seem to do is particularly prioritize the ones you added first, but that is a very small price to pay for finally being able to queue for all the LFRs at once!
Filed under: Raiding