Multiple shots on goaa.

I'm perplexed about my experiences of only getting one shot on goal when with a transsexual provider.  This seems to be a constant issue, and I'm not sure how to avoid it from happening if that is even an option.  The lack of shots hasn't been an issue with regular fs providers.  
Is this a normal thing with transsexuals, or just my bad luck?  I have avoided asking about it during the initial contact, since I realize that type of talk is strongly discouraged.
The only ts provider this hasn't been so issue with is ts lailani, who Btw, is awesome.
Thanks