HELP!! Calling EXTPGM before and after changing the library list ...

All,

I've got an external program prototype with the EXTPGM keyword.  Now, the
way this is use is as follows:

MyExtPgm();
System('ADDLIBLE MYOTHLIB POSITION(*FIRST)');
MyExtPgm();

Two programs named MyExtPgm exist, one in my standard library and one in the
'MYOTHLIB'

The reason for the two programs is that I have two versions of a file, one
in each library.

When I ran my job, the first call to MyExtPgm worked fine.  During the
second call however, I got a level check because the file in MYOTHLIB was
opened by the standard library program instead of the MYOTHLIB program.

Now I just ran into this, so I haven't got real deep.  But, when I got the
level check, I did check the current library list of the job and it did have
MYOTHLIB first.  Also, I used DSPFD and DSPPGMREF to make sure that the file
levels were what was expected for each version of the program.

At this point, it seems that my ILE RPG program resolved the EXTPGM at the
first run; thus finding the standard copy. When it was called again after
changing the library list the name wasn't re-resolved.

Is this really what is going on????  Or am I crazy???

If it is working as it is supposed to, how do I get around it?

Thanks,
Charles