Transparency slider continuity problem

When using the transparency slider, I noticed sometimes when I put it all the way to its maximum, the terminal became completely transparent. When looking into that I noticed that even though the slider moves at 0.1 intervals, it changes the value according to the mouse positioning, so when putting the slider at its maximum sometimes puts a value bigger or lower than 1 in the config file, the same value discrepancy happens at other points in the slider.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: terminator 0.97-2ubuntu0.1
ProcVersionSignature: Ubuntu 3.16.0-31.41~14.04.1-generic 3.16.7-ckt5
Uname: Linux 3.16.0-31-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Feb 28 17:19:36 2015
ExecutablePath: /usr/share/terminator/terminator
InstallationDate: Installed on 2015-02-28 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=pt_BR.UTF-8
 LANGUAGE=pt_BR:pt:en
 XDG_RUNTIME_DIR=<set>
SourcePackage: terminator
UpgradeStatus: No upgrade log present (probably fresh install)