I've sent out quite a few of my Assassin Recruits, 4 of whom are level 10 Assassins, and they still haven't come back. When I look to see how long it will be until they show back up, it gives me a long decimal number with something like +e17:13 at the end. Is there a way to fix this and make them come back, or are they gone forever? Has anybody else had this problem? I'm on PS3 BTW.

I looked around on google for you, and though Ezio's recruits do have a number of known glitches and bugs, I couldn't find one that fitted your description. It does seem that Brotherhood has the most bugs and glitches on PS3 compared to the 360 and PC.
I'm afraid I can't help you. I hope they'll still come back though.

Well, last night after I posted this, I looked around some more, and still could not find an answer. But eventually the time went back to normal, then I just had to wait the 12 or so minutes for them to all come back. Somebody said that if you visit Leonardo, that it will go back to normal, so I did, but it did not immediatly fix it. A little while later I went back to the hideout and checked on them and it was normal again. Thanks for your attempts to help though none the less.