The 5 main western LD trains currently are 1/2 (SSL), 3/4 (SWC), 5/6 (CZ), 7/8 (EB) and 11/14 (CS), so what happened to train numbers 9 and 10? Was there a "train 9/10" in the Amtrak era that does not run anymore? If not, why was that number pair skipped?