Definitely something weird somewhere and now afraid to give acorns.
During first incidence, I thought I had pressed the button twice because I didn't see it register as being given on the post so that may explain the 1.11 given twice.
But in giving the first 2.50 acorn, I pressed button once and then went on to the other post to give the second 2.50. After that I noticed that 5 acorns were given to the previous post and I thought how coincidental that somebody gave enough to equal 5....not knowing that it was me...
I will just be more careful with these fingers and the keys and see how I do.