I went on to try to replicate the error with InForm's editor and I'm baffled, TempodiBasic.
When I try to change the caption of a button to "1", the autoname feature renames the control as "BT", not "1BT".
Then I went on to try to manually rename the control (not the caption) to "1BT". InForm didn't let me.
My question is: How were you able to name those controls with a number as the first character?