What is the relation between Fit Parametric Survival and Fit Life by X and how do I get alpha values?

[#1]

I am using Fit Parametric Survival with a weibull fit to several different groups of data (group 0 to group 19) with only location effect. Parallelly I am verifying the alpha values of the weibull fit to the different groups from Fit Life by X plot. I understand that in the Fit Parametric Survival plot, it takes the last group as the anchor point and calculates the intercept (not sure what exactly that means). But what I have figured out that the relationship between the estimates from the Fit Parametric Survival and Fit Life by X is as follows: 

estimate from Fit Life by X = exp(intercept + estimate from Fit Parametric Survival)

I have verified this is true for all the groups except the last one i.e. group 19 as shown below. How do I get the alpha of the group 19 from the intercept and estimates of the Fit Parametric Survival table?