Cam Seal Issue

[jdmvafi4]

I just rebuilt the Robin eh35 engine in my 92 ezgo. Had it bored to I believe .35 over, or whatever the next standard size was available in the rebuild kit. Had no issues, ran great. Put about 5 hours on it. Decided to change the oil. Cleaned oil filter, reinstalled, put 1.5 quarts of oil in it. Ran great on test runs and no leaks. All of the sudden oil trail and oil everywhere. Determined it was coming from the rear (clutch side) cam seal. Disassemble that side of the engine and sure enough the cam seal was pushed out. Seconding guessing myself now if I has properly seated the replacement seal during the rebuild. Clean everything up, reseat the seal, reassemble the engine, add oil, test run, runs great. Wife calls at work, oil pouring out again. No doubt the cam seal from what she is describing. Why is the cam seal pushing out?