It's just more convenient to use this way.. In this case version 1.0.30 will not confuse at all. All our versions have the following format:
1.X.XX - major version id. It's changed only if there are real huge changes in script core or anything like that
1.
X.XX - also great changes but in most cases this includes only addon changes. or addition of some good modules for the script
1.X.
XX - not so serious changes, they more bugfixes than a new modifications or addons