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Sorry to hear about your situation…
Harrisburg University is not the best in the world and it is notorious for Day 1 CPT…So, that could be one thing to consider…Also, your area seems very sensitive in terms of education…your previous G4 visa is also playing a part for this visa…See, if you can go to stamping with a better school…
It is very hard to know why the Visa Officer continues to reject your visa…not very uncommon these days, there are many rejections…all you can do is be prepared and then try to give answers… Good Luck !