Hobie one 14 /Holder 14 monohull fiberglass seats flexing

Hi all,

I have a '95 Hobie one 14/holder 14
The fiberglass seats in the cockpit.
Here are some pictures
[url]https://sailingtexas.com/201401/sholder14126.html
[/url]
Not my boat but I don't have a picture on me.
Basically the seating area is flexing and bending downward, not much maybe about a 1/8 inch and at max 3/8 inch.
Is this an issue? Because the boat is dual hulled it makes it hard for me to repair without cutting everything up or making a repair that doesn't look good
Right where the gunwale meets the seat area there have been gelcoat cracks that I have been attempting to repair as well.
Any advice?