Hi Seattleguy2,
First off, welcome to Terra Forums!
Regarding the work of Pinguiculaman in editing your posts, please don't take it personally: Joseph frequently edits my spelling as well, and I appreciate it. Joseph worked for many years as an editor, so these things are second nature to him.
Proper spelling of the binomials is to be encouraged among members who are hopefully reagrded as friends: it's all part of the education process that these Forums offer. It takes a lot of effort to edit all these posts, so please don't be offended! You are , of course, entitled to spell as poorly as you like and I am sure that Joseph will offer no further correction unless asked ;-)
In regards to your question, if you are using pure mineral free water, and keeping them very moist at all times, then this might just be part of the growth cycle these plants experience. Individual rosettes in my collection, mature, flower and die off, and seem relatively short lived compared to other species. Do your plants flower?
Most of your conditions sound good for this species. LFS is a fairly pure medium, but it is also very low in micronutrients. Perhaps the addition of some rinsed peat/sand to the mix will afford something that is missing presently. Even though these plants grow in nutrient deficient conditions, nutrients are still needed. Being a woodland species, I am sure that rain falling through the canopy of trees also delivers some nourishment to the plants.
I have not found them to be as light demanding as other Drosera species. One issue though: do you regularly change your light tubes? These become less effective over time: 8 months max. Mine grow best in cool conditions, and I keep mine very wet, although other growers seem to have success with other methods as well.
Why not experiment? Take some of the offsets, and use a different protocol: different people have different experiences in growing these plants. No single set of conditions applies broad spectrum accross the board. Try a different substrate, perhaps less humid, more light, more feeding, warmer temps. In other words, if what you're doing isn't working for you, try something else. Once you hit on an optimal combination, stick with it.
You are fortunate that this species is so common and prolific in it's offsetting. If you lose this species, it is easily replaced. Sometimes it seems like whatever I do is wrong when cultivating an unfamiliar species! The thing is to choose one set of variables, and alter just that: be attentive and observe the results. If it fails, change another set.