Previous Next Issue

I have been having trouble with the Previous Next in this site for a while now, have looked at all the the remedies in this forum and noe are working for me.

I am running the Page Navi plugin with now problem and disabling it does not fix my other problems.

I have just uncovered some interesting results though. I go to this page (https://coastalcare.org/sections/features/beach-of-the-month-features/) and hit the Older button at the bottom, I do not get to the next page (/page/2/) I can get there manually of course, but the interesting thing is if I hit reload, andclick on the Older button repeatedly while the page is reloading, I can actually get the button to work and take me to page 2.

Very strange? Does any one have a clue in Thunderdome white might be the gremlin here?

For code I am using the standard code:

<div class=”next”><?php next_posts_link(‘Older’) ?></div>
<div class=”prev”><?php previous_posts_link(‘Newer’) ?></div>

Many thanks,
JL