It seems like a good deal. Chairs look sturdy, though a bit on the heavy side. The table folds fairly small. Based on similar items on other sites the price at Sierra seems to be a good deal.

Order Summary

One Alps Mountaineering Roll-Up Camp Table - Aluminum #99081-30 = $23.01

two Alps Mountaineering Steel Leisure Chair #98998-30 = $38.34

Subtotal: $61.35
+ Shipping: $9.95
+ Sales Tax: $0.00
Order Total: $71.30
YOUR 20% DISCOUNT HAS BEEN APPLIED

Links- 20% Coupon, table, chair, and FWC.

I'm having trouble reproducing OPs experience.

I tried placing the items stated into my cart, checked out, and applied 20% off coupon. Here is my results:

Order Summary

One Alps Mountaineering Roll-Up Camp Table - Aluminum #99081-30 = $28.76

two Alps Mountaineering Steel Leisure Chair #98998-30 = $47.92

Subtotal: $76.68
+ Shipping: $9.95
+ Sales Tax: $0.00
Order Total: $86.93
YOUR 20% DISCOUNT HAS BEEN APPLIED

Is there a step I'm omitting? ...or perhaps the deal has changed.