I had the exact same issue in my league. EVERY league I have been in automatically cancels the trade proposals if no action is taken within a set amount of time(usually a week, if not less) It is CRAZY to think a trade I propose in week 1 would still be available for approval in week 10 unless I go in and actually remove the offer. I will say this is my first, and likely my last, season with fleaflicker. This site seems to offer nothing special compared to the ESPN's and Yahoo's out there(it even has more restrictions). If you want to be a standout host site and actually attract leagues to move here, you must offer more. For you commish's that actually want real control, I recommend Myfantasyleague.com. Hands down the best, and if you can get the other owners to agree to split the fee(10 teams would be $7/team) it is worth it:)
We'll review this option in the offseason for sure