DIY checkin and upgrades - please help!!

Hi there - well 1st post on the forum - was introduced to the website by Dave at the Strat - glad he recommended it cos lots of great info. Thanks Dave.
Anyway - just flew back from vegas. Have flown quite a bit and am a gold member.
1st question is : I always request 81 A and 81 C as early as possible at the airport on day of departure. Last week we were the first to physically check in. But the checkin employee said seats 81 A and C were already gone. luckily 81 H and 81 K were available so no problems.
We thought must be babies on board for the bulkhead seats thats why 81 A and C were gone. But on boarding they were just two adults.
SO can 81 A and C - the bulkhead seats be allocated via DIY checkin?? Be grateful if anyone knows cos Virgin staff dont seem to know or willing to advise.
ALso - sorry for two questions in one post - do they ever upgrade people in the bulkhead seats and/or exit seats - like I say am a gold member and have flown a lot but only upgraded twice to Upper Class in 5 years. But I spose we do fly on the LGW config. (i.e. not many UC seats available).
Anyway thanks if anyone can help.
Anyway - just flew back from vegas. Have flown quite a bit and am a gold member.
1st question is : I always request 81 A and 81 C as early as possible at the airport on day of departure. Last week we were the first to physically check in. But the checkin employee said seats 81 A and C were already gone. luckily 81 H and 81 K were available so no problems.
We thought must be babies on board for the bulkhead seats thats why 81 A and C were gone. But on boarding they were just two adults.
SO can 81 A and C - the bulkhead seats be allocated via DIY checkin?? Be grateful if anyone knows cos Virgin staff dont seem to know or willing to advise.
ALso - sorry for two questions in one post - do they ever upgrade people in the bulkhead seats and/or exit seats - like I say am a gold member and have flown a lot but only upgraded twice to Upper Class in 5 years. But I spose we do fly on the LGW config. (i.e. not many UC seats available).
Anyway thanks if anyone can help.