Leak

hello, I recently had my pool motor replaced and as soon as I installed I noticed a leak behind the seal plate underneath the pool motor. Took it to the local store and had the shaft seal replaced again after they have had when putting in new motor and leak was still there. I then had the seal plate and impeller replaced and for about 2 1/2 weeks it didn’t leak but now it’s leaking a tiny amount but very noticeable when looking underneath. Has anyone ever had this trouble before? Is the local store not placing the parts correctly? Please help

My guess would be that the shaft seal is installed incorrectly. Either one of the pieces is not sitting flush or a piece is backward.