The current version of the Broadmoor East course has had its hole sequence changed in the last 20 years or so. It used to head away from the clubhouse/hotel and not return until the 15th hole (current 18th); now it returns to the clubhouse/hotel with the former 18th—the par 5 where Nicklaus won the US Amateur over Charlie Coe—now the 3rd. I’m pretty sure they did it because the current 18th provides more room and better gallery visibility/theater etc. for major championships like the US Amateur and Senior Open that they’ve held in the past 15 years. I think the current version is better, as the par 4 18th with the second shot over the pond and the clubhouse/hotel behind is a nice finisher. The East course itself isn't the original as we know--it's a composition of Donald Ross holes and RTJ holes; the West course has the rest of the original Ross course holes as well as RTJ holes. I note the Ross and RTJ holes below.
Current/Old #s 1/1 (Ross), 2/2 (Ross), 3/18 (Ross), 4/16(Ross), 5/17(Ross), 6/3(Ross), 7/4 (RTJ), 8/5(RTJ), 9/6 (RTJ)
10/7(RTJ), 11/8(RTJ), 12/9(RTJ), 13/10(RTJ), 14/11(RTJ), 15/12(RTJ), 16/13(Ross), 17/14(Ross), 18/15(Ross).