Why does transmission slip when it catches btwn 1/2 and 2/3 catches REALLY hard

What is your question?

It sounds like the tranny disengages from the motor and rpm's go up until I let off of accelerator.

What makes this problem better or worse?

Being heavy footed when accelerating

How long has your 2005 Volkswagen Jetta had this problem?

Since I've had the car