Hmm...I tried my best not to alter the layers from the default layers, but it does appear that the layers got swamped out. I think I know when it happened. While teaching myself, I added the ServiceLine feature layer to the Lead Service Line Field Map in Field Maps Designer. Both layers are added with the same name, Service Line, to Field Maps Designer and apparently, I deleted the wrong one. 🙁
I don't typically save when snooping around but it appears I did this time. Lesson learned. The layer and associated smart form have a lot of expressions and auto calculations that were lost when removing...bummer.
Since we haven't done much more than add fields, I think I'm just going to redeploy a new solution, rather than try to recreate the layer and smart form. Thanks for the assistance.
--Chris