Join Date: Sep 2013
Location: Shaw Direct Product Development Lead
You can change them as frequently as you want, no limits. The online bit is a bit tricky since we lost our "true" programming changer back in 2015. However, you can change them online, you'd just have to look at it as building the package from scratch. IE, you can't say, minus this one and add this one only. You'd have to effectively start over by selecting the full amount from scratch (I know, not ideal, but it would work).
I'll also mention online orders are processed by a human so they won't take effect immediately.