Limited entering of text on signs and weird behavior while typing numbers

When I want to enter text like this

"room 101"

The sign goes "room1", then "room0"... (I can't type two numbers, they are replacing themselves,and it deletes the space between literals and numbers)

Also, I tried
"room
101"

Goes the same. Deletes the enter mark.

Also, I can't type ">" and "<" (I use to make simple arrow signs sometimes)

HTC Desire S, Android 2.3.7