[pbmserv] Question about Yinsh (possible bug?)

["Marco Ferrando" <marco.ferrando@laposte.net>]

Hello all.
please observe the following yinsh game:

> Summary of Yinsh Board 176
> 
> It is lucax's turn.
> 
>    White (O)           Black (X)        
>    marco               lucax            
>   31 i7-h7            32 g5-g7          
>   33 j9-j10           34 g7-h8          
>   35 j8-i8            36 k7-e1          
>   37 xj5-j9xh7;j10-j7
> 
> 
> Rings Off Board: White 1 Black 0
> Markers Remaining 29
> 
>                 11
>              10    
>           9     .     . 
>        8     .     .     . 
>     7     .     .     .     . 
>  6     .     .     .     .     . 
>           .     .     .     .     
>  5     .     .     .     x     O 
>     .     .     .     .     .     o 
>  4     .     .     .    (x)    O 
>     .     .    (x)    x    (o)    o 
>  3     .     .     x     *     O 
>     .     .     .     o     o     o 
>  2     .     x     .    (x)   (O)
>     .     .     .     x    (o)    x 
>  1     .     .    (o)    o     + 
>           .     .     o     x     
>        .    (x)    x     x     + 
>     A     .     .     o     o     K
>        B     .     o     x     J
>           C    (x)    o     I
>              D           H
>                 E     G
>                    F

if I removed the column j5-j9 after that Luca flipped the marker in j6,
how can I flip the markers in j8 and j9? Shouldn't this intersections be
empty? 
Is this a bug or I'm missing something? 

Thank you for your answer.
Regards, Marco Ferrando.

P.S. BTW I'm not very proud of my last move... :-)