Ah yes, I see, well short term fix for you to do now, just go into your mods directory where everything is stored in .zip files and modify the fluroflux prototypes/fluroflux.lua, goto line 297, and change spoil_ticks = 30 * seconds, to however many seconds you want/need, whilst I figure out a better solution, such as incorporating a mod setting (I haven't done this yet, and will need to work it out) or tinkering more with the spoilage timers.
In other news try my slipstacks mod for a nice stone alternative if you are struggling for landfill! Also the Boompuff agriculture is another great way to get wood.
Perhaps the next mod I make will be a simple wood only plant alternative for Gleba too.