When raiding recount now does what is "lazy" syncing. That is it does not sync at all during combat and waits for combat to end to sync. This does make it appear as if it records data after combat but this extra data are corrections due to the sync.
The advantage of this approach is that it removes all addon traffic when you need it most: During combat, while still retaining syncing. The disadvantage is that it's not yet widely used so I understand that it can look like a bug at first.
The sync code is very new though and I still look for loads of reports on its functionality. I already got a good few leads for improvements on it.
Well, dont know if it was caused by the timer problem as well, but i did record OOC healing, dmg, etc. right after 2.4 was released (using the first 2.4 version of Recount). If we did wait for the synching to end and started healing, it would be recorded, and i was the exact amount of the healingspell you cast that was added to your healing. Will test it again tonight.