Showing entries Problem.. help me

Hi

I have one question, and I hope to answer.
For example, if you have a total of 38 entries and 10 entries per page,
On page 3, you'll see '21 to 30 of 38 entries'.
If you change to see 25 entries per page in that state,
'26 to 38 of 38 entries' should be normal.
But on my web it looks like '14 to 38 of 38 entries'.
I do not know where the problem is.
Please help me.