Some days I've been dosing 2 scoops alphamine+hemavol pre. I don't know about the diarrhea but thinking back I did have some days when I went like 4 or 5 times. I can't remember if it was days I took the alphamine or not though. But, I would think after an initial "cleansing period" you should get back to solid poos.
Edit-I went back to my log and yes, one of my 4 poo days was when I took 2 scoops alphamine pre. So I would say it could be the culprit. Tough it out and see if it doesn't solidify soon.