Missing transactions!

When I created my Buxfer account I configured it to sync automatically. I later changed this to sync manually, because I liked being able to review and tag my transactions as I imported them, without worrying I would miss one. Well, it's been a busy week, and I haven't logged in since April 15th. I tried to synchronize my transactions today (April 23rd), but buxfer only imported 2 transactions, from April 22nd. I checked my account on my bank's website, and sure enough, there are transactions on the 16h, 17th, 20th, and 21st, all of which are missing! The fact that the most recent transactions (those I'm most likely to remember) synced, but others did not, with no indication that anything is wrong, has seriously shaken my confidence in Buxfer. Is this because I have it set to only synchronize manually? If I turn it back to automatic, will that keep this from happening again?