Brad V,
I had the same problem with the Helm and Navigator station seats in Empty Pockets.
Parker replaced them for free. The replacement Spider/Sliders were a completely different configuration than what was on the chairs initially.
I have not had an issue with them since.
Empty Pockets was built late in 2004 and sold as a 2005, early in 2005.
If your boat is a similar age, perhaps you have the same type of Spider/Sliders that I had to replace.
Give the folks at Parker a call and see what they can do. I am going to guess the reason they changed the configuration of the Spider/Sliders to the one I have installed now on Empty Pockets, is that there was a problem with the old design.
Good luck . . . I understand your frustration . . . it drove me batty until I replaced them.
Kevin G.