The factory wiring is set up like a standard bass, so the blue hot wire to the output jack goes to the bottom (in image) lug of the volume pot (left pot in image) which is correct, and the blue to the tone pot connects to the volume's middle lug, also correct. The hot from the pickup, which looks to be yellow here, should connect to the middle lug of the volume pot (along with the blue wire to tone), so that needs to be swapped. There also looks to potentially be some shorting between the solder blob on the ground lug of the volume pot and its middle lug... that would cause problems.

We also need a photo of how you are connecting the split cols of the P-pickup, as Stan said. Is yellow the hot, is black the ground and how are the two coils linked etc? (the colours can vary between different batches of kits)