I have an ACT in mine too and it was doing the same thing last week. It's not the clutch though. I took it to the dealer to have some other work done and had them look at the tranny at the same time cuz I thought my fluid might be low. It turns out that my clutch master cylinder is pretty much shot. If those go bad then they can cause the shifting problem you described. They are replacing mine along with the top tranny seal and changing the fluid. I get it back today. I'll let you know how it is when I get it back.