add validation via right-click context menu-> data validation
1. select allow as "whole number".
2. choose data as "between"
3. type 1 into minimum
4. type 10 into maximum.
5. click OK.
6. check the value again, maximum has became "=10"

P.S. application work normally, just syntax is inconsistent with minimum.
see DataValidationImpl._unescapeFromPoi(). it's a side effect from ZSS-866