Can you just clarify your workflow here. You say "After I send my TIFs over...", is that correct or do you mean after you send your Raw files over and get the TIFs coming back?
1) RAW file goes into develop module,
2) I select "Auto" and make small adjustments,
3) I right click and select "Edit in photoFXlab.exe", selecting "Edit copy with Lightroom Adjustments"
4) Image opens in photoEXlab, I select the Topaz filter I want, edit and then choose "OK"
5) Image is brought back into LR, but adjustments are not visible (not even the "Auto" adjustments from LR before Topaz filter)
6) I look at images before and after edited image while in Develop module to see if adjustments will appear, but no adjustments appear.
7) I move to Gallery module and all adjustments appear; I go back to Develop module, still no adjustments appear.
8) I exit LR, return back in, and the adjustments appear in all modules.
Next, can you clarify your action #1? Resetting the preferences is something that you could try, but your description doesn't tie in with how the preferences are reset (i.e. your reference to Creative Cloud is confusing me).
Using Shift+ Alt while selecting LR on the CC menu resets all LR preferences to default (deletes former preference file; used in case of corrupt file). After doing so, you have to reinstall any user installed plug-ins and reset all preferences.