I've been toying with just dropping wednesday altogether and resting on that day

lol

I'm sure trisooner will be able to provide you with a complete breakdown of what you should be doing if you provide him with the numbers he's asked for. IMO, just from glancing at your program, you are strong on the bike and very weak on the run, yet you spend most of your time on the bike. Nothing wrong with resting on Wednesday, but one of those bikes needs to be converted to a run until you are consistently able to run 3-6 miles at a time.

You are way out of whack :) Plugging in the numbers you provided, you spend about 6.5 hours on swim/bike/run (not counting weights):

Swim: 1 hour (1000 meters in an hour) - 15% of your time
Bike: 4.5 hours (~90 miles at a ~17.15 avg pace) - 70% of your time
Run: Less than 1 hour (4 miles X 12:00 per mile) - 15% of your time

If you plug in your weights too:
Swim: 12.5%
Bike: 56%
Run: 12.5%
Weights: 19%

You can see that your bike under either scenario is fine, but your swim and run are getting way too little attention. And the weights take up way too much time. According to the numbers you provided, you are putting in ~8 hours a week. You should see much better finish times that what you have experienced. It just takes re-focussing your efforts and determining where to best spend your time.

First, your bike is fine. And if keeping your weight routine is important, cut that back to one hour weekly and get in 7 hours of tri training with a better balance. I would reduce the bike to 45% of your week time allocation. I would get up to 35% on the run and 20% in the pool.

20% Swim (2:30 per 100m): 1.4 hours per week, 3,360 total meters in two to three sessions
45% Bike (17.15 mph avg): 3.15 hours per week, 54.02 total miles in two rides
35%: Run (12 min mile): 2.45 hours per week, 12.25 total miles in three runs

The fractions work out to funny distances (who ride .02 miles?), but you get the idea. To get in these times/distances, cut out one of the weekday rides and you'll get 54. Work up to increasing your weekday runs to four miles and replace one of the cycling days with another four miler. Eliminate a weekday weight session and replace it with a swim. You'll still get in seven hours of tri training with a better 20% swim/45% bike/35% run blend; you'll still get in your group ride and endurance ride; and you'll still get in your weights.