Your plants have wet feet and they are getting trench foot. They are pulling their toes out of the mud and trying to dry them in the sun. Mix some dry soil in the bag to help them out.
agree with this bit of info ....you soil will be that compact with the waterlogging and your plants will be pushing itself out as the soil as its to wet/compact....you plant does not want to be in there...
p.s when you replant them make sure to burry them deep anuff. but make sure your soil is not as wet or the stem will rot when you burry them again.....its either that or some1 is fucking with ya a pulling them out
(i still cant see it being a animal of some sort)
keep it green
highlander