Help! My idioms lesson evaporated!
Generally I've been loving Duolingo Spanish.... About a week ago I took a bunch of lingots and "bought" the Idioms lesson. My memory is less than perfect so I was glad the program assured me that the completed lesson would show up on my Skills Tree. However as soon as I completed the second of the two lessons - it disappeared instead! Any help out there with how to recover it? If need be I'd be glad to fork over more lingots and review the lessons!