It is actually 30K (25K after the 1st use and 5K for adding an AU). The annual 10K booster is the same as the current Continental OPP card and should not be considered as the signup bonus.

Also from T&C:
"Priority Boarding:
MileagePlus Explorer Card members will be granted boarding access to the plane after the boarding of Special Needs passengers, elites and those with Premier Access designations, but before General Boarding of the remaining passengers. Benefits apply to the primary cardmember on the credit card account and anyone traveling on the same reservation. ..."