One HalfShaft Spins, Other doesnt?

I have a 1991 Geo Metro 160k miles, automatic.

Both of the outer cv boots have broken on the fwd car and the joints were bad. So I decided to replace the half shafts since they were only $75 each at the local auto parts store. I replaced the drivers side shaft and drove on the car for a few days. Then I bought the half shaft for the passenger side of the car once I had the money and replaced it.

Once I was finished with installation I went to make sure everything worked properly. I put it in reverse and it was a little slow to accelerate, which is normal for this car. Then when I put it in drive it was really slow to accelerate. So I pulled back into the garage jacked it up and ran the car. Only the passenger side wheel was spinning. The drivers side which was the first half shaft I replaced wasn't spinning or speratically at times slower than the passenger side.

The drivers side was working fine until I replaced the half shaft on the other side of the car. Now it won't spin at all, while the passenger side engages just fine.

I would just reinstall the drivers side again and see what happens, but I would like the opinions of an expert first. Thanks in advance.