Training with lots of bricks

I have previous injuries with my back and knee and find rest days useful. I am also good at pushing my self so, I have devised my training schedule with many days off but with regular bricks or mini triathlons. My workout is as follows:

Monday - off
Tuesday - Swim 700-1000m (short day), Bike 1hr+ (long day), and Run 2k (short day).
Wed - Lift Lower Body
Thursday - Swim 1500+ (long day), Bike 20 min (short day), and Rund 2k (short day).
Friday off
Saturday - Lift Upper body
Sunday - Bike 10 min+ (short warmup) and run long day (currently 4k).

I also try to do Power Yoga 3-5x per week. On the short days I work on technique and pace.

Your thoughts are appreciated. FYI , I am training for my first tri (St. Anthony's in April) and I started training as a zero in September. My weight has come down from 270+ to 230, but I have not lost any weight in the last three months despite vigrous training and good diet. I am not focused on the weight but on building my fitness. Yesterday I played 3 hours of tennis and was not evening breathing hard. So, I have made progress in that respect, but because of my weight, it is impossible to keep my heart rate below 160 when I run with any pace. I can still carry on a conversation and have clocked by max running hr at 195 consistently. My resting (overnight heart rate is down to 41).