Resizing CPU/Memory for VMs is unintuitive. The prompt appears to be declarative, however it is addition/subtraction (+/-). 

For example: If I have 2 CPUs, and I want to resize to 4 CPUs. I need to put 2 CPUs to achieve 4 CPUs. If I put 4 CPUs, then my VM will resize to 6 CPUs.

For example: If I have 2 CPUs, and I want to resize to 4 CPUs. I need to put 2 CPUs to achieve 4 CPUs. If I put 4 CPUs, then my VM will resize to 6 CPUs.

1. Go to VM view. Virtualization > Virtual Machines > <vm name>
2. Select edit CPU|Memory
3. Add/substract.

For example: If I have 2 CPUs, and I want to resize to 4 CPUs. I need to put 2 CPUs to achieve 4 CPUs. If I put 4 CPUs, then my VM will resize to 6 CPUs.