2 weeks post op and still pretty sore with muscle spasms frequently, is that normal?

It is fairly common to experience soreness and muscle spasms two weeks post-operation, especially when implants are placed under the muscle, as in your case with 330cc textured gummy teardrop implants. Tight chest muscles, as noted by your surgeon, can contribute to this discomfort due to the added strain from accommodating the implants. Typically, this should gradually improve as your body adjusts to the implants. However, if the pain persists or worsens, it is important to consult with your surgeon to ensure there are no complications affecting your recovery.

Muscle Spasm after Breast Augmentation with sub-muscular placement is extremely common, and should be expected for the first month or so. Consult with your surgeon if your spasms persist. 
Congratulations and good luck to you.
Shahin Fazilat, M.D., FACS

Having muscle spasms at this time is not uncommon after breast surgery.  If you continue to have discomfort or further questions, make sure you follow up with your plastic surgeon.  Best of luck!