@theredmoose
Shades can usually be moved to any percent (+/- 1 - 2%). So basically if you tell it to go to 12% for example it will usually end up between 11 and 13%.
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There is the following smartapp by @whoismoses that lets you do it on ST’s mobile app: [Release] Shady - Group your shades & blinds and control as a single device
It basically lets you add all your shades into one group and if you tell it to move to a certain position all of them will move there. Using it you can tell the group to go to a certain position through Alexa.
One thing you need to note is that the limitations for commands are between ST and Alexa. The shades themselves simply pair as a switch or dimmer switch, and have their capabilities. The following DH by @whoismoses brings additional features: https://github.com/ericvitale/ST-Z-Wave-Shade/tree/master but I don’t think it offers an align shade command through Alexa. To overcome that you might have to use a custom Alexa integration for ST such as AskAlexa or Echoassistant. -
See point 1.