Another CLEP scoring question...

[tpk]

I took three exams today...Principles of Management, Prin. of Macroecon, and Prin. of Microecon...

Management - 72 out of 100 q's answered correctly...unofficial ACE = 50
Macro - 70 out of 80 q's answered correctly....unofficial ACE = 50
Micro - 67 out of 80 q's correct....unofficial ACE = 50

What gives? It doesn't make a difference, credits are going to Excelsior, but I'm trying to wrap my head around this.

Thanks for any help/guidance!