Description of problem:
Set multiplier of a sparse cartridge to 2, and scale up this application several times, only the head gear of the application has haproxy, the rest gears are still only have web_framework cartridges

Version-Release number of selected component (if applicable):
On devenv_3901

How reproducible:
Always

Steps to Reproduce:
1. Create a scalable application, take php-5.3 for example
rhc create-app php1s php-5.3 -s
2. On broker, set the multiplier of haproxy-1.4 to 2
oo-admin-ctl-app -l jhou -a php1s --cartridge haproxy-1.4 -c set-multiplier --multiplier 2
3. Scale up the application
rhc cartridge-scale php-5.3 -a php1s --min 6 --max -1
4. On node, verify that half of total gears of the application should have haproxy

Actual results:
After step 4, only the first gear of the application has haproxy, the rest gears only have php framework

=== 525e252336500d10f900000c php-5.3+haproxy-1.4
app-deployments
app-root
git
php
=== 667980963568207590850560 php-5.3+haproxy-1.4
app-deployments
app-root
git
php
=== 525e252336500d10f900000b php-5.3+haproxy-1.4
app-deployments
app-root
git
php
=== 525e252336500d10f900000a php-5.3+haproxy-1.4
app-deployments
app-root
git
php
=== 525e252436500d10f900000d php-5.3+haproxy-1.4
app-deployments
app-root
git
php
=== 525e22d736500d3ec3000042 php-5.3+haproxy-1.4
app-deployments
app-root
gear-registry
git
haproxy
php


Expected results:
At least 3 gears of the application should have haproxy 

Additional info: