[yocto] a question about multilib

[Yes Yanus]

Hi everyone,
 I have a question about multilib. I have a layer which is Independent of meta. this layer include some bb files and some of them are same with bb files in meta. for example, ncurses_5.7.bb in my layer and ncurses_5.9.bb in meta. but when I run command bitbake lib32-ncurses the bb file in meta is called. I have set the priority in my layer. the prority is higher than layer in meta. why bb files in my layer can't be called ?
and if I run bitbake ncurses then bb files in my layer can be called.

Who can tell me the cause and how to solve the question?

Thanks
yes
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