Cym roots and leaves

[Amanda L]

I decided to go ahead and un-pot my cym that is very past due for re-potting. It took a long time and 2 people to get plant free from the pot . When we got the plant free all I saw was one massive bunch of tangled roots. Some are dead and some are healthy. I have started to untangle the roots, no small task. I have damaged some . Does anyone have any helpful hints on getting this massive root mess apart. This plant also needs to be divided. I am going to give one of the divisions to a lady at work. Any helpful hints on dividing this up? It is soaking right now, to hopefully help get the roots free of each other.
The good news is I haven't seen one snail. I thought there would be a lot, since I found a few when I brought it home. The cowards didn't have the nerve to show themselves at the store! I did however find something lurking on the underside of the leaves. I am not sure what it is. Any helpful hints on what it is and how to get rid of it?
I need a lot of helpful hints .