This is probably very basic and I am sure I am missing something, but,
if the lease is for 90.32 acres out of a 640 acre unit and I own a
sixteenth of that 90.32 acres, it would seem my ownership decimal would
be calculated as follows:

90.32 acres/640 acre unit*.0625 (my sixteenth) or 0.141125
*0.0625=.0088203125*.25 royalty  = 0.002205078125 yet Exco shows
0.00074134 as my interest on the royalty checks.

Anyone have any input? (I have a call in to Exco)