You don't tell us what those signals are. I can guess the top one is the sampling clock, but I have no idea what the others are, other than the one you actually labelled 'recovered signal'.
But several things jump out to me: the recovered signal looks like it's got a little bit of clipping. or limiting. I assume (just guessing) that your last plot is the fft of the recovered signal, which looks like it has all the odd harmonics. Perhaps that's due to the clipping. Also, if you haven't filtered the recovered signal, the artifacts of sampling will also show up in your fft.